Patent Publication Number: US-10775683-B1

Title: Multi-camera multi-position adapter

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     None 
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
     Not Applicable 
     THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT 
     Not Applicable 
     INCORPORATION-BY-REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISC 
     Not Applicable 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     This invention pertains to the field of photography, and to methods and structures for adjustably mounting different digital camera bodies to view camera systems in different orientations using a multi-position, adjustable camera adapter. 
     Description of Related Art 
     Two US patents describe related patent art. These are: “Adjustable Camera Mounting Device”, U.S. Pat. No. 6,354,544 by Michael Muzila; and “Camera Support”, U.S. Pat. No. 4,693,575 by James H. Keller. The &#39;544 patent by Muzila discloses an adjustable camera mounting device or bracket, including a base member having a curved recess portion which receives a camera mounting member having a complementary curved configuration. A spring-biased pressure member and oppositely positioned guide members are mounted within the curved recess portion of the base member and are received within a complementary groove in the camera mounting member, permitting the camera mounting member to be continuously rotatably movable within the base member. The &#39;575 patent by Keller discloses a camera support of holder for a hand-held camera that has an arcuate member that is held in a user&#39;s palm. The “palm ring” is attached to the standard threaded recess in the camera that is normally used for attaching a tripod to the camera. 
     Neither patent discloses or teaches structures for rigidly (but, adjustably) mounting a camera body (which can be digital or film) to a large-format view camera system, such as the “Horseman-L 4×5” camera made by the Komamura company in Japan. A traditional view camera system is a large format camera in which the lens forms an inverted image on a ground glass screen directly at the plane of the film. The image viewed is exactly the same as the image on the film, which replaces the viewing screen during exposure. This type of camera was first developed in the era of the daguerreotype (1840s-1850s) and is still in use today, though with many refinements. It comprises a flexible bellows that forms a light-tight seal between two adjustable standards, one of which holds a lens, and the other a viewfinder or a photographic film holder. The bellows is a flexible, accordion-pleated box. It encloses the space between the lens and film, and flexes to accommodate the movements of the standards. 
     In a traditional view camera system, the front standard comprises a board at the front of the camera that holds the lens and, usually, a shutter or lens cap. At the other end of the bellows, the rear standard comprises a frame that holds a ground glass plate, which is used for focusing and composing the image before exposure, which is replaced by a holder containing the light-sensitive film, plate, or image sensor for exposure. The front and rear standards can move in various ways relative to each other, unlike most other camera types. These movements provide control over focus, depth of field, and perspective. The camera is usually used on a tripod or other support. A monorail camera is the most common type of studio view camera, with front and rear standards mounted to a single guide rail that is fixed to a camera support (e.g., tripod). This design gives the greatest range of movements and flexibility, with both front and rear standards able to tilt, shift, rise, fall, and swing in similar proportion. 
     Photographers use view camera systems to control focus and convergence of parallel lines. Image control is done by moving the front and/or rear standards. Rise-and-fall are the movements of either the front or rear standard vertically along a line in a plane parallel to the film (or sensor) plane. Moving the front standard left or right from its normal position is called lens shift, or simply shift. This movement is similar to rise-and-fall, but moves the image horizontally rather than vertically. The axis of the lens is normally perpendicular to the film (or sensor). Changing the angle between axis and film by tilting the lens standard backwards or forwards is called lens tilt, or just tilt. Tilt is especially useful in landscape photography. By using the Scheimpflug principle, the “plane of sharp focus” can be changed so that any plane can be brought into sharp focus. Altering the angle of the lens standard in relation to the film plane by swiveling it from side to side is called swing. Swing is like tilt, but it changes the angle of the focal plane in the horizontal axis instead of the vertical axis. For example, swing can help achieve sharp focus along the entire length of a picket fence that is not parallel to the film plane. Specialized digital camera backs exist for large-format view cameras, but these are very expensive due to the large sensor size. What is needed, then, is a method and structure to attach relatively-inexpensive digital camera bodies (e.g., 35 mm DSLR cameras) to traditional large-format view camera systems in a variety of orientations. Against this background, the present invention was developed. 
     SUMMARY OF THE INVENTION 
     The present invention relates to a variety of view camera systems, including some antique wooden cameras, which use an adjustable adapter assembly to attach a relatively-inexpensive film camera body or digital camera sensor to the view camera. The adapter assembly includes a C-shaped support arc, and an L-shaped, cantilevered camera mount that is removably attached to the arc. The camera mount can be attached to the support arc at three orientations: portrait, 45° tilt, or landscape. A digital camera body can be attached to the camera mount with a thumb screw. The view camera system can have dual, 5-axis movements that allow for tilt, swing, rise and fall, shift, and micro-focus adjustments. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S) 
         FIG. 1  shows an elevation rear view of a first embodiment of a multi-position camera adapter  8  and removable camera body  10 , according to the present invention. 
         FIG. 2A  shows an elevation rear view of a first embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. 
         FIG. 2B  shows an elevation side view of the first embodiment of a C-shaped support arc  16 , according to the present invention. 
         FIG. 3A  shows an elevation rear view of a first embodiment of a cantilevered camera mount  14  and removable camera body  10 , according to the present invention. 
         FIG. 3B  shows an elevation rear view of a second embodiment of a cantilevered camera mount  14  and removable camera body  10 , according to the present invention. 
         FIG. 4A  shows an elevation rear view of the first embodiment of a multi-position camera adapter  8  and removable camera body  10 , according to the present invention. 
         FIG. 4B  shows an elevation rear view of the first embodiment of a multi-position camera adapter  8  and removable camera body  10 , according to the present invention. 
         FIG. 5  shows an elevation rear view of a first embodiment of a camera system  6  comprising a multi-position camera adapter  8  and removable camera body  10  oriented parallel to the Y-axis (portrait mode), that is rotatably and slidably attached to an adjustable rear L-frame, according to the present invention. 
         FIG. 6  shows an elevation rear view of a first embodiment of a camera system  6  comprising a multi-position camera adapter  8  and removable camera body  10  oriented at 45° to the horizontal X-axis, that is rotatably and slidably attached to an upright standard of an adjustable rear L-frame, according to the present invention. 
         FIG. 7  shows an elevation rear view of a first embodiment of a camera system  6  comprising a multi-position camera adapter  8  and removable camera body  10  oriented parallel to the horizontal X-axis (landscape mode), that is rotatably and slidably attached to an upright standard  30  of an adjustable rear L-frame  34 , according to the present invention. 
         FIG. 8  shows an elevation rear view of a second embodiment of a camera system  6 ′ comprising a second embodiment of a multi-position camera adapter  8 ′ and removable camera body  10  oriented parallel to the Y-axis (portrait mode), that is rotatably and slidably attached to an upright standard  30  of an adjustable rear L-frame  34 , according to the present invention. 
         FIG. 9  shows an elevation rear view of a third embodiment of a camera system  6 ″ comprising a multi-position camera adapter  8  and removable camera body  10  oriented parallel to the Y-axis (portrait mode), that is attached directly to an upright standard  30  of an adjustable rear L-frame  34 , according to the present invention. 
         FIG. 10  shows an isometric exploded perspective view of a camera system  6  comprising a multi-position camera adapter  8  and removable camera body  10  oriented parallel to the Y-axis (portrait mode), that is rotatably and slidably attached to an upright standard  30  of an adjustable rear L-frame  34 , according to the present invention. 
         FIG. 11  shows an isometric perspective rear view of the first embodiment of a C-shaped support arc  16 , according to the present invention. 
         FIG. 12A  shows an isometric perspective rear view of the first embodiment of a cantilevered camera mount  14 , according to the present invention. 
         FIG. 12B  shows an isometric perspective rear view of another embodiment of a cantilevered camera mount  14 , according to the present invention. 
         FIG. 13A  shows a plan view of the first embodiment of a cantilevered camera mount  14 , according to the present invention. 
         FIG. 13B  shows a plan cross-section view of the top end of a cantilevered camera mount  14  attached to a semi-circular support arc  16 , according to the present invention. 
         FIG. 13C  shows a plan view of the top end of a cantilevered camera mount  14  attached to a semi-circular support arc  16 , according to the present invention. 
         FIG. 14  shows an isometric rear perspective view of a view camera system  4  comprising a multi-position camera adapter  8  and attached camera body  10  oriented parallel to the Y-axis (portrait mode), that is rotatably and slidably attached to an upright arm (standard)  30  of an adjustable rear L-frame  34 , including an adjustable front L-frame  34 ′, according to the present invention. 
         FIG. 15  shows a side elevation view of a view camera system  4  comprising a multi-position camera adapter and removable camera body  10  oriented parallel to the Y-axis (portrait mode), that is rotatably and slidably attached to an upright arm (standard)  30  of an adjustable rear L-frame  34 , with an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72 , wherein both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a horizontal guide rail  38 , according to the present invention. 
         FIG. 16  is a photograph showing an isometric perspective view of a prototype view camera system  4  comprising a multi-position camera adapter  8  and DSLR camera body  10  oriented parallel to the Y-axis (portrait mode), that is rotatably and slidably attached to an upright arm (standard)  30  of an adjustable rear L-frame  34 , with an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72 , wherein both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a horizontal guide rail  38 , according to the present invention. 
         FIG. 17  is a photograph showing a rear elevation perspective view of a prototype view camera system  4  comprising a multi-position, adjustable camera adapter  8  and Sony-brand DSLR camera body  10  (Sony α7II) oriented parallel to the y-axis (portrait mode), that is rotatably and slidably attached to an upright arm (standard)  30  of an adjustable rear L-frame  34 , with an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72  and shutter  110  (or lens cap, not shown), wherein both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a horizontal guide rail  38 , according to the present invention. 
         FIG. 18  is a photograph showing a side elevation perspective view of a prototype view camera system  4  comprising a multi-position, adjustable camera adapter  8  and Sony-brand DSLR camera body  10  oriented parallel to the y-axis (portrait mode), that is rotatably and slidably attached to an upright arm (standard)  30  of an adjustable rear L-frame  34 , with an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72  and shutter  110 , wherein both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a horizontal guide rail  38 , according to the present invention. 
         FIG. 19  is a photograph showing a front elevation perspective view of a prototype view camera system  4  comprising an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72  and shutter  110 , wherein both front L-frames  34 ′ is adjustably attached to a horizontal guide rail  38 , according to the present invention. 
         FIG. 20  is a photograph showing a rear isometric perspective view of a prototype view camera system  4  comprising an adjustable rear L-frame  34  and multi-position camera adapter  8 , according to the present invention. 
         FIG. 21  is a photograph showing an exploded, isometric perspective view of a prototype adjustable camera adapter  8  comprising a multi-position support arc  16  and a positionable camera mount  14 , according to the present invention. 
         FIG. 22  is a photograph showing a rear isometric perspective view of a 50 mm lens  72  mounted in a lens board  70 , according to the present invention. 
         FIG. 23  is a photograph showing a front isometric perspective view of a 50 mm lens  72  mounted in a lens board  70 , according to the present invention. 
         FIG. 24  is a photograph showing a front isometric perspective view of a 35 mm lens  72  mounted in a lens board  70 , according to the present invention. 
         FIG. 25  is a photograph showing an isometric rear perspective view of a prototype view camera system  4  comprising a multi-position camera adapter  8  and DSLR camera body  10  oriented 45° to the Y-axis (45° tilt mode), that is rotatably and slidably attached to an upright arm (standard)  30  of an adjustable rear L-frame  34 , with an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72 , wherein both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a horizontal guide rail  38 , according to the present invention. 
         FIG. 26  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. 
         FIG. 27  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. 
         FIG. 28  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. 
         FIG. 29  shows an isometric perspective rear view of another embodiment of a C-shaped support arc  16 , according to the present invention. 
         FIG. 30  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. 
         FIG. 31  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. 
         FIG. 32  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. 
         FIG. 33  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. 
         FIG. 34  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. 
         FIG. 35  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. 
         FIG. 36  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. 
         FIG. 37  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. 
         FIG. 38  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. 
         FIG. 39A  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. 
         FIG. 39B  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. 
         FIG. 40  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. 
         FIG. 41  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. 
         FIG. 42A  shows an elevation rear view of another embodiment of a view camera system  6  comprising a multi-position camera adapter assembly  8  and removable camera body  10  oriented at γ=56° to the horizontal x-axis (i.e., maximum-vertical mode), according to the present invention. 
         FIG. 42B  shows an elevation rear view of another embodiment of a view camera system  6  comprising a multi-position camera adapter assembly  8  oriented at γ=56° to the horizontal x-axis (i.e., maximum-vertical mode), according to the present invention. 
         FIG. 42C  shows an elevation rear view of another embodiment of a view camera system  6 , according to the present invention. 
         FIG. 43A  shows an elevation rear view of another embodiment of a view camera system  6  comprising a multi-position camera adapter assembly  8  and removable camera body  10  oriented at γ=34° to the horizontal x-axis (i.e., maximum-horizontal mode), according to the present invention. 
         FIG. 43B  shows an elevation rear view of another embodiment of a view camera system  6  comprising a multi-position camera adapter assembly  8  oriented at γ=34° to the horizontal x-axis (i.e., maximum-horizontal mode), according to the present invention. 
         FIG. 43C  shows an elevation rear view of another embodiment of a view camera system  6 , according to the present invention. 
         FIG. 44  shows an elevation side perspective view of an embodiment of a view camera system  3 , according to the present invention. 
         FIG. 45  shows an elevation rear perspective view of an embodiment of a view camera system  3 , according to the present invention. 
         FIG. 46  shows an elevation side perspective view of an embodiment of a view camera system  3 , according to the present invention. 
         FIG. 47  shows an elevation rear perspective view of an embodiment of a view camera system  3 , according to the present invention. 
         FIG. 48  shows a front elevation perspective view of an embodiment of a view camera system  2 , according to the present invention. 
         FIG. 49  shows a rear elevation perspective view of an embodiment of a view camera system  2 , according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIGS. 1-49  show examples of various embodiments of the present invention. The present invention relates to a view camera system that uses an adjustable adapter assembly to attach a relatively-inexpensive camera body with a digital sensor (or film) to a rigid part of the view camera&#39;s structure. The adjustable adapter assembly includes a C-shaped support arc and an L-shaped, cantilevered camera mount that is removably attached to the support arc. The camera mount can be attached to the support arc at multiple, different positions, e.g., corresponding to portrait, 45° tilted, or landscape orientations. A film or digital camera body can be attached to the camera mount using a standardized thumb screw. The multi-camera, multi-position camera adapter of the present invention can be used with medium-format, large-format, or panoramic view camera systems. 
     The camera bodies used in this invention can be either traditional film or digital cameras, and they can have a range of sensor sizes; ranging from: micro four/thirds, APC, full-frame (35 mm), 4″×5″, 5″×7″, 8″×10″ format, or even larger formats (including extra-wide or ultra-wide panoramic formats). A view camera system can comprise: a rear film plane, a front lens plane, an extension bellows disposed between the two planes, and a front lens board with a front lens and optional shutter (or lens cap). The camera body can be used without a directly-mounted lens (in which case the camera body is simply acting as a light-gathering sensor or film). Preferably, a full frame (35 mm sensor size) Digital Single Lens Reflex (DSLR) camera body is used. Alternatively, the DSLR camera body can have a medium-sized sensor, e.g., 44 mm×33 mm. In other embodiments, the camera body can be replaced with just a sensor chip (e.g., CCD chip) inside a much smaller enclosure. Note also that wherever a machine bolt (screw) is mounted in a threaded hole to join two parts together, that an alternate construction can be used that comprises an unthreaded through-hole and a nut threaded on the far side of the machine bolt (screw). Note also that the use of the words “standard” or “upright standard” are synonymous with an upright vertical arm of an L-frame of a view camera system. 
       FIG. 1  shows an elevation rear view of a first embodiment of a multi-position adjustable camera adapter  8  and removable camera body  10 , according to the present invention. Camera adapter  8  comprises two mating parts that are attached together with a pair of machine screws (not shown, which can be a pair of cap-head machine bolts). The two mating parts include: (1) a C-shaped support arc  16 , and (2) a L-shaped, cantilevered camera mount  14 . Note that camera body  10  is illustrated herein with dashed lines, indicating that the camera body itself is not an essential or required part of some embodiments of the invention. Camera body  10  comprises a multi-pixel sensor chip  12 , which has a central point labelled “S”. Camera body  10  also can comprise an optional viewfinder prism  11 . Camera body  10  can also comprise a live digital display (not shown) located on its backside. Camera mount  14  comprises a curved (semi-circular) outer portion  104  with radius=R b , and a pair of unthreaded through-holes  54 ,  54 ′ (not shown) that are spaced apart a distance=b. Mount  14  further comprises an inner curved side portion with radius=R s  (see  FIG. 3A ). Mount  14  further comprises a cantilevered portion  15  that has an unthreaded through-hole  17 , which is appropriately sized to hold a standardized tripod thumb screw  18  (e.g., ¼-20 screw size) that screws into a standardized tripod threaded hole  19  in the base of camera body  10 , for the purpose of rigidly attaching camera body  10  to cantilevered base  15  of mount  14 . 
     Referring still to  FIG. 1 , support arc  16  can be a semi-circular arc, with an outer radius=R o  and an inner radius=R i , where R i &lt;R o . Note that: R i &lt;R b &lt;R o . In this view, support arc  16  is a sector of a circle, having a sector central angle, β, which is less than 180°, but is greater than 90°. In this example, the sector angle β=134°. Support arc  16  comprises three pairs of threaded holes:  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′, which are oriented perpendicular to the rear face  94  of arc  16 . Each pair of threaded holes is spaced apart circumferentially at a same distance=b. The three pairs of threaded holes:  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′, can be located radially offset a small distance away from a centerline circumference (not shown) of arc  16  (i.e., holes  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′ can be located closer to the inner surface  96  at R i ). These three pairs of mounting holes allow the camera mount  14  to be optionally mounted in one of three different (i.e., multiple) positions, corresponding to three different camera orientations (portrait, 45° tilted, and landscape). The other angle, a, defining the radial centerlines of each pair of through-holes ( 22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′) can be positioned at +/−45°; indicating that support arc  16  is symmetric about a horizontal line (x-axis) that bisects the arc. Support arc  16  further comprises a vertical flat portion  20  centered at the horizontal line that bisects arc  16 , which has a height=a, where a&gt;b. Note that the upper right-hand corner of support arc  16 , labelled “B” in  FIG. 1 , is located a vertical distance=d above the uppermost edge of camera body  10 . In some embodiments, d≥(R o −R i ). In general, support arc  16  and camera mount  14  can be made of magnesium, or aluminum or aluminum alloy, or steel, or another dense metal or alloy, which can be anodized black or painted black. Attachment screws/bolts can also be made of steel, or magnesium, or aluminum or aluminum alloy, all of which can be anodized black or painted black. In the example shown in  FIG. 1 : a=55 mm; b=36 mm; c=62 mm; R o =90 mm; R i =77 mm; R h =81 mm; β=134° and α=45°. 
       FIG. 2A  shows an elevation rear view of a first embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. Support arc  16  has an outer radius=R o , and an inner radius=R i , where R i &lt;R o . In this view, support arc  16  is a sector of a circle, having a sector angle, β, which is less than 180°, but is greater than 90°. In this example, β=130°. Support arc  16  comprises three pairs of threaded holes:  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′, which are oriented perpendicular to the rear face  94  of arc  16 , and are positioned radially at a same radius=R h  from the geometric center, S, of the sensor chip  12 . These threaded mounting holes allows the camera mount  14  to be optionally mounted in one of three different (multiple) positions, corresponding to three different camera orientations (portrait, 45° tilted, and landscape). The angle, α, defining the radial centerlines of each pair of through-holes ( 22 ,  22 ′;  24 ,  24 ′, and  26 ,  26 ′) can be +/−45°. Support arc  16  further comprises a vertical flat portion  20  centered at the horizontal line along the x-axis that bisects arc  16 , which has a height=a, where a&gt;b. Support arc  16  further comprises four, parallel, horizontal through-holes  21 ,  21 ′,  21 ″, and  21 ′″ (which are all unthreaded), and which are oriented substantially perpendicular to inside face  97  of arc  16 . Through-holes  21 ,  21 ′,  21 ″, and  21 ′″ allow support arc  16  to be securely mounted onto a rigid support structure of a view camera system (not shown). Note that the upper right-hand corner of support arc  16 , labelled “B” in  FIG. 2A , is located a vertical distance=d above the uppermost edge of camera body  10 . In some embodiments, d≥(R o −R i ). The length of inner radius R; is greater than the diagonal dimension “c” of camera body  10  (i.e., R i &gt;c). In some embodiments, R h ≥c+18, where R h  and c are measured in mm. 
       FIG. 2B  shows an elevation side view of the first embodiment of a C-shaped, support arc  16 , according to the present invention. Support arc  16  further comprises four, parallel, horizontal through-holes  21 ,  21 ′,  21 ″, and  21 ′″ (which are all unthreaded), and which are oriented perpendicular to inside face  96  of arc  16 . Through-holes  21 ,  21 ′,  21 ″, and  21 ′″ allow support arc  16  to be securely mounted onto a rigid support structure of a view camera system (not shown). Two of the holes  21 ′ and  21 ″ can be located offset on the left-hand side of arc  16 , while the other two holes  21  and  21 ′″ can be located offset on the right-hand side of arc  16 . Other numbers of through-holes can be used for the plurality of holes, for example, two or three holes, instead of four (as in the present example). Support arc  16  further comprises three pairs of threaded holes:  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′, which are oriented substantially perpendicular to the rear face  94  of arc  16 . These three pairs of threaded mounting holes allow camera mount  14  to be optionally attached in one of three different (multiple) positions, corresponding to three different camera orientations (i.e., portrait, 45° tilted, and/or landscape). Note that through-holes  21 ,  21 ′,  21 ″, and  21 ′″ can optionally be countersunk on the inner surface  96 . Threaded holes  22 ,  22 ′,  24 ,  24 ′,  26 , and  26 ′ can penetrate completely through the thickness, t, of arc  16  (i.e., from the rear side  94  to the front side  98  of arc  16 ). Alternatively, threaded holes  22 ,  22 ′,  24 ,  24 ′,  26 , and  26 ′ can partially penetrate into the thickness, t, of arc  16  (e.g., 50% to 75% deep), (not shown). 
       FIG. 3A  shows an elevation rear view of a first embodiment of an L-shaped, cantilevered camera mount  14  and removable camera body  10 , according to the present invention. Camera mount  14  comprises a curved (semi-circular) outer portion  104  with radius=R b , and a pair of unthreaded through-holes  54 ,  54 ′ that are spaced apart a circumferential distance=b. In some embodiments, R b &gt;c, where c=diagonal distance of camera body  10 . Mount  14  further comprises an inner curved side portion  105  with a smaller radius=R s  (i.e., R s &lt;R b ). R s  can, for example, range from ⅓ to ¼ times R b . Mount  14  further comprises a cantilevered extension portion/base  15  that has an unthreaded through-hole  17 , which is sized appropriately to receive a standardized thumb screw  18 , and which screws into standardized, threaded tripod hole  19  in the base of camera body  10  for the purpose of rigidly attaching camera body  10  to cantilevered base portion  15  of mount  14 . 
       FIG. 3B  shows an elevation rear view of a second embodiment of an L-shaped, cantilevered camera mount  14  and removable camera body  10 , according to the present invention. Camera mount  14  comprises a curved (semi-circular) outer portion  104  with radius=R b , and a pair of unthreaded through-holes  54 ,  54 ′ that are spaced apart a circumferential distance=b, and are radially positioned at the same radius=R h  from the geometric center, S, of the sensor chip  12  as the radius R h  of the three pairs of threaded holes  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′ in arc  16 . In some embodiments, R b &gt;c, where c=diagonal distance of camera body  10 . Mount  14  further comprises an inner curved side portion  105  with smaller radius=R s . R s  can range from ¼ to ⅙ times R b . Mount  14  further comprises a horizontal, straight-line segment  107  that joins to semi-circular segment  105 . Mount  14  further comprises a cantilevered extension base portion  15  that has an unthreaded through-hole  17 , which is sized appropriately to receive a standardized, tripod thumb screw  18 , and which screws into threaded tripod hole  19  in the base of camera body  10  for the purpose of rigidly attaching camera body  10  to cantilevered base portion  15  of mount  14 . 
       FIG. 4A  shows an elevation rear view of the first embodiment of a multi-position camera adapter  8  and removable camera body  10  mounted in a portrait orientation, according to the present invention. Radial gap dimension “e” is shown, which is defined by the following equation: e=R o −R b . This gap, e, which can range from 3-5 mm, is needed to prevent interference of the outer circular arc portion  104  of camera mount  14  with a vertical adjustment cylinder  28  (not shown) when the mount  14  is attached at 45° tilted to the horizontal x-axis (see, e.g.,  FIG. 6 ). Support arc  16  further comprises three pairs of threaded holes:  22 ,  22 ′; and  24 ,  24 ′; and  26 ,  26 ′, which are oriented substantially perpendicular to the rear face  94  of arc  16 . These pairs of threaded mounting holes allow the camera mount  14  to be optionally attached in one of three different (multiple) positions, corresponding to three different camera orientations (i.e., portrait, 45° tilted, and/or landscape). The circumferential distance between each pair of the three pairs of threaded holes is the same, and is equal to b. The circumferential distance between adjacent holes (e.g., holes  24  and  22 ′; or  26  and  24 ′) is also the same, and is equal to g, where g&lt;b, as can be seen in  FIG. 4A . In this example: a=55 mm, b=36 mm, c=62 mm, g=27 mm, h=15 mm, and the ratio g/b=0.75. Also, R; =77 mm, R h =81 mm, and R o =90 mm. 
       FIG. 4B  shows an elevation rear view of the first embodiment of a multi-position camera adapter  8  and removable camera body  10  mounted in a portrait orientation, according to the present invention. The three pairs of threaded holes  22 ,  22 ′; and  24 ,  24 ′; and  26 ,  26 ′ in arc  16  are circumferentially positioned at a same interior circumferential angular spacing, θ. In this example, θ=26°. The adjacent circumferential angular spacing, ϕ, defined as the adjacent circumferential angle disposed in-between adjacent pairs of holes (e.g., holes  24  and  22 ′; or holes  26  and  24 ′) is less than the interior circumferential angular spacing, θ, inside of each pair of holes. In other words, ϕ&lt;θ. In this example, ϕ=19° and θ=26°, and the ratio of angles ϕ/θ=0.75 (which is the same as the ratio of circumferential distances g/b=0.75 discussed above). In this example, the sector central angle, β=136°, and the circumferential angular offset of the first hole ( 22 ), ψ=10°. Note that θ+ϕ=45° (which is a general requirement). Note: the angles are measured in degrees. 
       FIG. 5  shows an elevation rear view of a first embodiment of a view camera system  6  comprising a multi-position camera adapter  8  and removable camera body  10  oriented parallel to the y-axis, γ=90°, (i.e., portrait mode), according to the present invention. Camera adapter  8  is rotatably and slidably attached to an upright rear arm (standard)  30  of a positionable rear L-frame  34  via movable, vertical adjustment cylinder  28  (which can rotate around the x-axis when upper thumb screw  36  is loosened). Likewise, vertical adjustment cylinder  28  can move up/down when the lower thumb screw  37  is loosened via a connected plate (not shown). Support arc  16  is securely attached to vertical adjustment cylinder  28  via four parallel, horizontal machine bolts  40 ,  40 ′,  40 ″, and  40 ′″. Horizontal arm  32  of L-frame  34  is adjustable left/right along the x-axis, and in/out along the z-axis by sliding along the length of guide rail  38 . Horizontal arm  32  of L-frame  34  is also rotatable around the y-axis using horizontal, adjustment cylinder  74 , which is rotatably and slidably attached to guide rail  38 . Tripod mount  120  is attached to the bottom of guide rail  38 . 
       FIG. 6  shows an elevation rear view of a first embodiment of a view camera system  6  comprising a multi-position camera adapter  8  and removable camera body  10  oriented at γ=45° to the horizontal x-axis (i.e., 45° tilt mode), according to the present invention. Camera adapter  8  is rotatably and slidably attached to an upright rear standard  30  of a positionable rear L-frame  34  via movable vertical adjustment cylinder  28  (which can rotate around the x-axis when upper thumb screw  36  is loosened). Likewise, vertical adjustment cylinder  28  can move up/down when the lower thumb screw  37  is loosened. Support arc  16  is securely attached to vertical adjustment cylinder  28  via four parallel machine bolts  40 ,  40 ′,  40 ″, and  40 ′″ (not shown). Horizontal arm  32  of L-frame  34  is adjustable and can be translated left/right along the x-axis, and in/out along the z-axis along the length of guide rail  38 . Horizontal arm  32  of L-frame  34  is also rotatable around the y-axis using horizontal adjustment cylinder  74 , which is rotatably and slidably attached to guide rail  38 . Tripod mount  120  is attached to the bottom of guide rail  38 . 
       FIG. 7  shows an elevation rear view of a first embodiment of a view camera system  6  comprising a multi-position camera adapter  8  and removable camera body  10  oriented parallel to the horizontal x-axis, γ=0°, (i.e., landscape mode), according to the present invention. Camera adapter  8  is rotatably and slidably attached to an upright rear arm (standard)  30  of a positionable rear L-frame  34  via movable, vertical adjustment cylinder  28  (which can rotate around the x-axis when upper thumb screw  36  is loosened). Likewise, vertical adjustment cylinder  28  can move up/down when the lower thumb screw  37  is loosened. Support arc  16  is securely attached to vertical adjustment cylinder  28  via four parallel machine bolts  40 ,  40 ′,  40 ″, and  40 ′″. Horizontal arm  32  of L-frame  34  is adjustable left/right along the x-axis, and in/out along the z-axis along the length of guide rail  38 . Horizontal arm  32  of L-frame  34  is also rotatable around the y-axis using horizontal adjustment cylinder  74 , which is rotatably and slidably attached to guide rail  38 . Tripod mount  120  is attached to the bottom of guide rail  38 . 
       FIG. 8  shows an elevation rear view of a second embodiment of a view camera system  6 ′ comprising a second embodiment of a multi-position camera adapter  8 ′ and removable camera body  10  oriented parallel to the y-axis (i.e., portrait mode), that is rotatably and slidably attached to an upright rear arm (standard)  30  of a positionable rear L-frame  34 , according to the present invention. Camera adapter  8  is rotatably and slidably attached to an upright arm (standard)  30  of a positionable rear L-frame  34  via movable, vertical adjustment cylinder  28  (which can rotate around the x-axis when upper thumb screw  36  is loosened). Likewise, vertical adjustment cylinder  28  can move up/down when the lower thumb screw  37  is loosened. Support plate  42  has a pair of square outer corners  44  and  44 ′, and a semi-circular inner arc  43  with radius=R i . Camera mount  14  can be bolted to support plate  42  at three different optional positions (multi-position), depending on the desired angle of orientation, γ. Horizontal arm  32  of L-frame  34  is also rotatable around the y-axis using horizontal adjustment cylinder  74 , which is rotatably and slidably attached to guide rail  38 . All three optional camera orientations are available in this second embodiment. Tripod mount  120  is attached to the bottom of guide rail  38 . 
       FIG. 9  shows an elevation rear view of a third embodiment of a camera system  6 ″ comprising a multi-position camera adapter  8  and removable camera body  10  oriented parallel to the y-axis (i.e., portrait mode), that is attached directly to an upright rear arm (standard)  30  of a positionable rear L-frame  34 , according to the present invention. In this third embodiment, vertical adjustment cylinder  28  has been removed, and support arc  16  is directly attached to vertical rear arm  30 . This particular embodiment can be used, for example, with older view cameras that have frames made of wood that do not tilt (e.g., Burke &amp; James). Horizontal arm  32  of L-frame  34  is also rotatable around the y-axis using horizontal adjustment cylinder  74 , which is rotatably and slidably attached to guide rail  38 . All three optional camera orientations are available to be used in this embodiment. Tripod mount  120  is attached to the bottom of guide rail  38 . 
       FIG. 10  shows an isometric, exploded perspective rear view of a view camera system  6  comprising a multi-position camera adapter assembly  8  and removable camera body  10  oriented parallel to the vertical y-axis (i.e., portrait mode), according to the present invention. Camera adapter  8  is rotatably and slidably attached to an upright rear arm (standard)  30  of an adjustable rear L-frame  34 . Camera adapter  8  comprises two mating parts that are attached together with a pair of cap-head machine bolts  64 ,  64 ′. The two mating parts include: a C-shaped, support arc  16 ; and a L-shaped, cantilevered camera mount  14 . Note that camera body  10  is illustrated with dashed lines, indicating that the camera itself is not a required part of this embodiment of the invention. Camera body  10  comprises a multi-pixel sensor chip  12 , which has a central point “S”. Camera body  10  also can comprise an optional viewfinder prism  11 . Camera body  10  can also comprise a live, digital display screen  13  located on its backside. The L-shaped, cantilevered camera mount  14  comprises a curved (semi-circular) outer portion  104 , and a pair of unthreaded through-holes  54 ,  54 ′. Mount  14  further comprises an inner, curved side portion  105  (which, optionally, can be a straight-line segment). Mount  14  further comprises a cantilevered extension base portion  15  that has an unthreaded through-hole  17 , which is appropriately sized to receive a tripod thumb screw  18  that screws into threaded tripod hole  19  in the base of camera body  10 , for the purpose of rigidly attaching camera body  10  to cantilevered portion  15  of mount  14 . 
     Referring still to  FIG. 10 , camera adapter  8  further comprises a C-shaped support arc  16 . In this view, support arc  16  is a sector of a circle, having a sector central angle, β, which is less than 180°, but is greater than 90°. Support arc  16  comprises three pairs of threaded holes:  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′, which are oriented substantially perpendicular to the rear face  94  of arc  16 . These mounting holes allows the camera mount  14  to be optionally mounted in one of three different (multiple) positions, corresponding to three different camera orientations (portrait, 45° tilted, and landscape). Support arc  16  further comprises a vertical flat portion  20  centered at the horizontal line that bisects arc  16 . The flat vertical portion  20  comprises four through-holes  21 ,  21 ′,  21 ″, and  21 ″ that hold four cap-head bolts  40 ,  40 ′,  40 ″, and  40 ′″, that are received by threaded holes  92 ,  92 ′,  92 ″,  92 ″, respectively, in vertical adjustment cylinder  28 . Vertical adjustment cylinder  28  can move up/down on recessed groove/track  102  (or rotate about the x-axis), when thumb screws  36  and/or  37  are loosened, respectively. These adjustments thereby provide a 5-axis motion capability (X, Y, and Z translations, and 2 rotations) for camera body  10 , thereby generating five traditional view camera adjustments (movements), including: tilt, swing, rise-and-fall, shift, and micro-focus of the rear plane. 
       FIG. 11  shows an isometric perspective rear view of the first embodiment of a C-shaped support arc  16 , according to the present invention. Support arc  16  is a sector of a circle, having a sector central angle, β, which is less than 180°, but is greater than 90°. Support arc  16  comprises three pairs of threaded holes:  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′, which are oriented substantially perpendicular to the rear face  94  of arc  16  These mounting holes allows a camera mount  14  (not shown) to be optionally mounted in one of three different multiple positions, corresponding to three different camera orientations (portrait, 45° tilted, and landscape). Support arc  16  further comprises a vertical flat portion  20  centered at a horizontal line along the x-axis that bisects arc  16 . The flat portion  20  defines four, parallel, horizontal through-holes  21 ,  21 ′,  21 ″, and  21 ″ (which are oriented substantially perpendicular to inner diameter surface  96  of arc  16 ) for holding four cap-head bolts  40 ,  40 ′,  40 ″, and  40 ′″ (not shown), that are received by threaded holes  92 ,  92 ′,  92 ″,  92 ′″ (not shown), respectively, in adjustment cylinder  28  (not shown). 
       FIG. 12A  shows an isometric perspective rear view of the first embodiment of a L-shaped, cantilevered camera mount  14 , according to the present invention. Camera mount  14  comprises a curved (semi-circular) outer portion  104  with radius=R b  (not shown), and a pair of unthreaded through-holes  54 ,  54 ′ that are spaced apart a distance=b. The centerlines of holes  54  and  54 ′ are aligned with the z-axis. Mount  14  further comprises an inner curved side portion  105  with a smaller radius=R s . Mount  14  further comprises a cantilevered extension/base portion  15  that has an unthreaded through-hole  17 , which is appropriately sized to hold a thumb screw  18  (not shown) that screws into standardized, threaded tripod hole  19  in the base of camera body  10  (not shown) for the purpose of rigidly attaching camera body  10  to cantilevered base portion  15 . Notch  55  is cut out from mount  14  (note: mount  14  was originally machined from a length of L-angle metal stock). Note also that mount  14  comprises two integral plates: a rear face plate  150  and an integral base plate  152 , which are disposed at right angles to each other (i.e., at 90°). This can be also seen in  FIGS. 13A and 13C . Through-holes  54  and  54 ′ are disposed in rear plate  150 , while through-hole  17  for holding thumb screw  18  (not shown) is disposed in cantilevered base plate  152 . Camera body  10  (not shown) can be mounted to base plate  152  using through-hole  17 . The proximal and distal ends of mount  14  are indicated. 
       FIG. 12B  shows an isometric perspective rear view of another embodiment of a L-shaped, cantilevered camera mount  14 , according to the present invention. In this embodiment, the location of through-hole  17 ′ is located offset in the z-axis direction away from the vertical centerline of base plate  152 . Alternatively, or in combination with the preceding sentence, the location of through-hole  17 ′ can be located offset in the vertical y-axis direction away from a horizontal centerline (not illustrated) of base plate  152 . Such X- or Y-offsets can be helpful for accommodating a camera body  10  that has a tripod screw mount  19  that is offset some distance away from the plane or centerline of the camera&#39;s sensor chip  12  (not shown). Also, additional holes or slots or openings or recesses (not shown) can be custom-machined into the rear face plate  150  and/or base plate  152  of camera mount  14 , as needed, (in addition to hole  17 ) to accommodate different locations of the camera body&#39;s tripod mounting hole  17 , electronic cables, doors (battery or memory card), or other items that protrude from the camera&#39;s body  10  (not shown) and might hit or interfere with mount  14 . 
       FIG. 13A  shows a plan view of the first embodiment of a cantilevered camera mount  14 , according to the present invention. Unthreaded through-holes  54 ,  54 ′, and  17  are shown. Note that mount  14  comprises two integral plates: a rear face plate  150  and an integral base plate  152 , which are disposed at right angles to each other (i.e., at 90°). 
       FIG. 13B  shows a plan cross-section view A-A of the top end of a camera mount  14  attached to a support arc  16  with a pair of cap-head bolts  64  and  64 ′, screwed into threaded holes  22  and  22 ′, respectively, through through-holes  54  and  54 ′ of mount  14 , respectively, according to the present invention. The rear face  94  and front face  98  of arc  16  are indicated. 
       FIG. 13C  shows a plan view of the top end of a cantilevered camera mount  14  attached to a semi-circular support arc  16 , according to the present invention. Mount  14  is attached to arc  16  with a pair of cap-head screws  64  (only one screw is shown). Thumb screw  18  is shown. Mount  14  can be machined from a stock piece of L-angle of steel or aluminum alloy. 
       FIG. 14  shows an isometric rear perspective view of a view camera system  4  comprising a multi-camera, multi-position adapter  8  and attached camera body  10  oriented parallel to the y-axis (i.e., portrait mode), that is rotatably and slidably attached to an upright rear arm (standard)  30  of an adjustable rear L-frame  34 , and including an adjustable front L-frame  34 ′, according to the present invention. Support arc  16  is securely mounted to rear vertical adjustment cylinder  28  with four, parallel, horizontal cap-head bolts  40 ,  40 ′,  40 ″, and  40 ′″ that screw into four, parallel, horizontal threaded holes  92 ,  92 ′,  92 ″, and  92 ′″ (not shown) disposed in rear vertical adjustment cylinder  28 . Camera body  10  can be securely mounted to camera mount  14  with tripod thumb screw  18  (not shown in this view). The height of adapter assembly  8  (and, hence, attached camera body  10 ) can be adjusted up and down along the y-axis, and/or adapter  8  can be rotated about the x-axis. An additional set of movements (z-axis translation, x-axis translation, and rotation about the y-axis) is provided by a pair of movable attachment mechanisms (not shown) that are disposed between horizontal support arms  32 ,  32 ′ and guide rail  38 . Optionally, vertical pins  84  and  84 ′ can be used that slide in track/groove  80 , which allows for rotation of arms  32  and  32 ′ about the y-axis, as well as translation of arms  32 ,  32 ′ along the length of guide rail  38  in the z-direction. A front lens board, front frame, and front lens/shutter or lens cap are not shown in this Figure. Front mounting hole  130 ′ in front vertical attachment cylinder  28 ′ can be used to attach a frame (not shown) that holds a front lens board (not shown). 
       FIG. 15  shows a side elevation view of a view camera system  4  comprising a multi-position, adjustable adapter assembly  8  (not shown) and attached camera body  10  oriented parallel to the vertical y-axis (i.e., portrait mode), that is rotatably and slidably attached to a upright rear arm (standard)  30  of an adjustable rear L-frame  34 , according to the present invention. View camera system  4  further comprises an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  with attached front lens  72  and optional shutter  110  (or lens cap, not shown). Both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a common, horizontal guide rail  38 . Horizontal guide rail  38  can be attached to an adjustable tripod mounting block  100 , for removably mounting the guide rail  38  of camera system  4  to a tripod  120 . The distance between front and rear L-frames  34 ′ and  34 , respectively, is equal to “H”, which can be decreased or increased by sliding the horizontal arms  32  and  32 ′ closer or further apart, respectively, along horizontal track/groove  80  in guide rail  38 . The vertical position of camera body  10  can be adjusted by moving the camera body up or down along track  102  in rear vertical arm  30 . Camera body  10  can be rotated about its x-axis by rotating the camera body  10  and locking it into place. Front lens  72  is mounted to lens board  70 , which is held by frame  79  mounted to a front vertical adjustment cylinder  28 ′ (not shown) on front vertical arm  30 ′. The position and orientation of lens board  70  (with mounted front lens  72  and optional shutter  110  or lens cap (not shown)) can be adjusted about five-axes by tilting, swinging, raising or lowering, shifting, or micro-focusing the lens board  70  using the five-axis movements of front L-frame  34 ′. Disposed in-between camera body  10  and lens board  70  is an adjustable, flexible extension bellows  78  that is rotatably attached to custom-machined, rotatable, cylindrical sealing rings  82  and  82 ′. The proximal and distal ends of bellows  78  are held in place with hose clamps  76  and  76 ′ on sealing rings  82  and  82 ′, respectively. Bellows  78 , in this example, is shown in its fully extended position. Tripod mount  120  is attached to the bottom of guide rail  38  with tripod mounting cylinder  100 . 
       FIG. 16  is a photograph showing an isometric rear perspective view of a prototype view camera system  4  comprising a multi-position, adjustable camera adapter assembly  8  and a Sony-brand DSLR camera body  10  (Sony α7II) oriented parallel to the y-axis (i.e., portrait mode), that is rotatably and slidably attached to a rear upright arm (standard)  30  of an adjustable rear L-frame  34 ; and with an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72  and shutter  110  (or lens cap, not shown), wherein both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a common horizontal guide rail  38 , according to the present invention. Front lens  72  is mounted to lens board  70 , which is held by square frame  79  by front vertical attachment cylinder  28 ′ on front vertical arm  30 ′ of front L-frame  34 ′. The position and orientation of lens board  70  (with mounted front lens  72 ) can be adjusted by tilting, swinging, raising or lowering, shifting, or micro-focusing the lens board  70  using the five-axis movements of front L-frame  34 ′. Disposed in-between camera body  10  and lens board  70  is an adjustable, flexible extension bellows  78  that is rotatably attached to custom-machined, rotatable sealing rings  82  and  82 ′ (not shown). The proximal and distal ends of bellows  78  are held in place with hose clamps  76  and  76 ′ on sealing rings  82  and  82 ′, respectively. Bellows  78 , in this example, is shown is its fully collapsed position. The bottom of rear L-frame  34  is attached to rotatable and slidable horizontal, adjustment cylinder  74 , which is attached to horizontal guide rail  38  (and, likewise, for the front L-frame  34 ′). Guide rail  38  is attached to tripod  120  (which affords additional degrees of rotation and movements). 
       FIG. 17  is a photograph showing a rear elevation perspective view of a prototype view camera system  4  comprising a multi-position, adjustable camera adapter  8  and Sony-brand DSLR camera body  10  (Sony α7II) oriented parallel to the y-axis (portrait mode), that is rotatably and slidably attached to a rear vertical arm (standard)  30  of an adjustable rear L-frame  34 , and with an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72  and shutter  110  (or lens cap, not shown), wherein both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a horizontal guide rail  38 , according to the present invention. Front lens  72  is mounted to lens board  70 , which is held by square frame  79  held in front L-frame  34 ′. Tightening thumb screw  36  secures the angular position of rear vertical adjustment cylinder  28 ; and tightening thumb screw  37  secures the vertical position of rear vertical adjustment cylinder  28 . The position and orientation of lens board  70  (with mounted front lens  72 ) can be adjusted by tilting, swinging, raising or lowering, shifting, or micro-focusing the lens board  70  using any combination of the five-axis movements of front L-frame  34 ′. Disposed in-between camera body  10  and lens board  70  is an adjustable, flexible extension bellows  78  (not shown) that is rotatably attached to custom-machined, rotatable sealing rings  82  and  82 ′ (not shown). The proximal and distal ends of bellows  78  are held in place with hose clamps  76  and  76 ′ on sealing rings  82  and  82 ′, respectively. The bottom of rear L-frame  34  is attached to rotatable and slidable horizontal, adjustment cylinder  74 , which is attached to horizontal guide rail  38  (and, likewise, for the front L-frame  34 ′). 
       FIG. 18  is a photograph showing a side elevation perspective view of a prototype view camera system  4  comprising a multi-position, adjustable camera adapter  8  and Sony-brand DSLR camera body  10  (Sony α7II) oriented parallel to the y-axis (portrait mode), that is rotatably and slidably attached to an upright arm (standard)  30  of an adjustable rear L-frame  34 , with an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72  and shutter  110  or lens cap (not shown), wherein both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a horizontal guide rail  38 , according to the present invention. Front lens  72  is mounted to lens board  70 , which is held by square frame  79  in front L-frame  34 ′. Tightening rear upper thumb screw  36  secures the angular position of the rear vertical adjustment cylinder  28 ; and tightening lower thumb screw  37  secures the vertical position of the rear vertical adjustment cylinder  28  (and, likewise, for the front L-frame  34 ′). The position and orientation of lens board  70  (with mounted front lens  72 ) can be adjusted by tilting, swinging, raising or lowering, shifting, or micro-focusing the lens board  70  using any combination of the five-axis movements of front L-frame  34 ′. Disposed in-between camera body  10  and lens board  70  is an adjustable, flexible extension bellows  78  that is rotatably attached to custom-machined, rotatable sealing rings  82  and  82 ′ (not shown). The proximal and distal ends of bellows  78  are held in place with hose clamps  76  and  76 ′ on sealing rings  82  and  82 ′, respectively. The bottom of rear L-frame  34  is attached to rotatable and slidable horizontal, adjustment cylinder  74 , which is attached to horizontal guide rail  38  (and, likewise, for the front L-frame  34 ′). Guide rail  38  is attached to tripod  120  (which affords additional degrees of rotation and movements). 
       FIG. 19  is a photograph showing a front elevation perspective view of a prototype view camera system  4  comprising an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72  and shutter  110  (or lens cap, not shown), wherein both front L-frames  34 ′ is adjustably attached to a horizontal guide rail  38 , according to the present invention. Front lens  72  is mounted to lens board  70 , which is held by square frame  79  in front L-frame  34 ′. Tightening front upper thumb screw  36 ′ secures the angular position of front vertical adjustment cylinder  28 ′; and tightening lower thumb screw  37 ′ secures the vertical position of the front vertical adjustment cylinder  28 ′. The position and orientation of lens board  70  (with mounted front lens  72 ) can be adjusted by tilting, swinging, raising or lowering, shifting, or micro-focusing the lens board  70  using any combination of the 5-axis movements of front L-frame  34 ′. In this example, lens board  70  is tilted upwards around the x-axis. The bottom of front L-frame  34 ′ is attached to rotatable and slidable horizontal, adjustment cylinder  74 ′, which is attached to horizontal guide rail  38 . 
       FIG. 20  is a photograph showing a rear isometric perspective view of a prototype view camera system  4  comprising a multi-position, adjustable camera adapter  8  and DSLR camera body  10  (Sony α7II) oriented parallel to the y-axis (portrait orientation), that is rotatably and slidably attached to an upright arm (standard)  30  of an adjustable rear L-frame  34 , with an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72  and shutter  110  or lens cap (not shown), wherein both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a horizontal guide rail  38 , according to the present invention. Tightening front upper thumb screw  36  secures the angular position of rear vertical adjustment cylinder  28 ; and tightening lower thumb screw  37  secures the vertical position of the rear vertical adjustment cylinder  28 . In this example, camera body  10  is tilted downwards around the x-axis. The bottom of rear L-frame  34  is attached to rotatable and slidable horizontal, adjustment cylinder  74 , which is attached to horizontal guide rail  38 . Guide rail  38  is attached to tripod  120  (which affords additional degrees of rotation and movements). 
       FIG. 21  is a photograph showing an exploded, isometric perspective rear view of a prototype adjustable camera adapter  8  comprising two parts: (1) a multi-position support arc  16 , and (2) an un-attached, positionable camera mount  14 , according to the present invention. Threaded holes  22 ,  22 ′,  24 ,  24 ′,  26  and  26 ′ can be seen in arc  16 . Through-holes  54  and  54 ′ can be seen, along with through-hole  17 , in mount  14 . 
       FIG. 22  is a photograph showing a rear isometric perspective view of a 50 mm lens  72  mounted in a lens board  70 , according to the present invention. Also shown is a short section of bellows  78  attached to lens board  70  with hose clamps  76  and  76 ′. This non-traditional, wide-angle lens plus lens board combination has been successfully used to make excellent photographs with a Horseman “L” 4×5 view camera system  4 , according to the present invention. 
       FIG. 23  is a photograph showing a front isometric perspective view of a 50 mm lens  72  mounted in a lens board  70 , according to the present invention. This non-traditional, wide-angle lens/lens board combination has been successfully used to make excellent photographs with a Horseman “L” 4×5 view camera system  4 , according to the present invention. 
       FIG. 24  is a photograph showing a front isometric perspective view of a 35 mm lens  72  mounted in a lens board  70 , according to the present invention. This non-traditional, wide-angle lens/lens board combination has been successfully used to make excellent photographs with a Horseman “L” 4×5 view camera system  4 , according to the present invention. 
       FIG. 25  is a photograph showing an isometric rear perspective view of a prototype view camera system  4  comprising a multi-position, adjustable camera adapter  8  and DSLR camera body  10  (Sony α7II) oriented 45° to the y-axis (i.e., 45° tilt mode), that is rotatably and slidably attached to a rear upright arm (standard)  30  of an adjustable rear L-frame  34 , with an adjustable front L-frame  34 ′ comprising a tiltable and positionable lens board  70  and front lens  72  and shutter  110  (or lens cap, not shown), wherein both front and rear L-frames  34 ′ and  34 , respectively, are adjustably attached to a horizontal guide rail  38 , according to the present invention. Front lens  72  is mounted to lens board  70 , which is held by square frame  79  held by front vertical attachment cylinder  28 ′ on a front vertical upright arm  30 ′ of front L-frame  34 ′. The position and orientation of lens board  70  (with mounted front lens  72 ) can be adjusted by tilting, swinging, raising or lowering, shifting, or micro-focusing the lens board  70  using any combination of the 5-axis movements of front L-frame  34 ′. Disposed in-between camera body  10  and lens board  70  is an adjustable, extension bellows  78  that is rotatably attached to custom-machined, rotatable sealing rings  82  and  82 ′ (not shown). The proximal and distal ends of bellows  78  are held in place with hose clamps  76  and  76 ′, respectively. Bellows  78 , in this example, is partially collapsed. The bottom of rear L-frame  34  is attached to rotatable and slidable horizontal, adjustment cylinder  74 , which is attached to horizontal guide rail  38  (and, likewise, for the front L-frame  34 ′). Guide rail  38  is attached to tripod  120  (which affords additional degrees of rotation and movements). 
       FIG. 26  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. Arc  16  comprises a plurality of equal-length, flat inside facets  180 ,  180 ′, etc. on the inside surface  96  of arc  16 ; and a series of flat outside facets  190 ,  190 ′, etc. on the outer surface  97  of arc  16 . The number of inside facets and outside facets can be the same, or different, from each other. In this example, the number of facets is =5, for both the inside and outside surfaces  96  and  97 , respectively. Alternatively, the number of facets can range from 2, 3, 4, 5, 6, 7, or 8, in various combinations on inside and outside surfaces  96  and  97 , respectively. In this embodiment, support arc  16  approximates a sector of a circle, having a sector central angle, β, which is less than 180°, but is greater than 90°. Support arc  16  comprises three pairs of threaded holes:  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′, which are oriented perpendicular to the rear face  94  of arc  16 . Each pair of threaded holes is spaced apart circumferentially a distance=b, and are located on an inscribed semi-circle with radius=R h  (see dashed, semi-circular line). These three pairs of mounting holes allow camera mount  14  to be optionally mounted in one of three different (i.e., multiple) positions, corresponding to three different camera orientations (portrait, 45° tilted, and landscape). Support arc  16  further comprises four, parallel, horizontal through-holes  21 ,  21 ′,  21 ″, and  21 ′″ (which are all unthreaded), and which are oriented substantially perpendicular to inside surface  96  of arc  16 . 
       FIG. 27  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. Arc  16  comprises a plurality of flat inside facets  180 ,  180 ′, etc. on the inside surface  96  of arc  16 ; and a single vertical outside surface  200  on the outer surface  97  of arc  16 . In this example, the number of inside facets is =5 on the inside surface of arc  16 . Alternatively, the number of inside facets can range from 2, 3, 4, 5, 6, 7, or 8. Support arc  16  further comprises a pair of square-shaped outer corners “B” and “C” that are connected by vertical line segment  200 . In this embodiment, support arc  16  approximates a sector of a circle, having a sector central angle, β, which is less than 180°, but is greater than 90°. Support arc  16  comprises three pairs of threaded holes:  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′, which are oriented perpendicular to the rear face  94  of arc  16 . Each pair of threaded holes is spaced apart circumferentially a distance=b, and are located on an inscribed semi-circle with radius=R h  (see dashed semi-circular line). These three pairs of mounting holes allow camera mount  14  to be optionally mounted in one of three different (i.e., multiple) positions, corresponding to three different camera orientations (portrait, 45° tilted, and landscape). Support arc  16  further comprises four, parallel, horizontal through-holes  21 ,  21 ′,  21 ″, and  21 ′″ (which are all unthreaded), and which are oriented substantially perpendicular to inside surface  96  of arc  16 . 
       FIG. 28  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. Arc  16  comprises a plurality of flat inside facets  180 ,  180 ′, etc. on the inside surface  96  of arc  16 ; and a single vertical outside surface  200  on the outer surface  97  of arc  16 . In this example, the number of inside facets is =3 on the inside surface of arc  16 . Alternatively, the number of inside facets can range from 2, 3, 4, 5, 6, 7, or 8. Support arc  16  further comprises a pair of square-shaped outer corners “B” and “C” that are connected by vertical line segment  200 . In this embodiment, support arc  16  approximates a sector of a circle, having a sector central angle, β, which is less than 180°, but is greater than 90°. Support arc  16  comprises three pairs of threaded holes:  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′, which are oriented perpendicular to the rear face  94  of arc  16 . Each pair of threaded holes is spaced apart circumferentially a distance=b, and are located on an inscribed semi-circle with radius=R h  (see dashed semi-circular line). These three pairs of mounting holes allow camera mount  14  to be optionally mounted in one of three different (i.e., multiple) positions, corresponding to three different camera orientations (portrait, 45° tilted, and landscape). Support arc  16  further comprises four, parallel, horizontal through-holes  21 ,  21 ′,  21 ″, and  21 ′″ (which are all unthreaded), and which are oriented substantially perpendicular to inside surface  96  of arc  16 . 
       FIG. 29  shows an isometric perspective rear view of another embodiment of a C-shaped support arc  16 , according to the present invention. Support arc  16  is a sector of a circle, having a sector central angle, β, which is less than 180°, but is greater than 90°. Support arc  16  comprises three pairs of threaded holes:  22 ,  22 ′;  24 ,  24 ′; and  26 ,  26 ′, which are oriented perpendicular to the rear face  94  of arc  16 . These mounting holes allows camera mount  14  to be optionally mounted in one of three different multiple positions, corresponding to three different camera orientations (portrait, 45° tilted, and landscape). Support arc  16  further comprises a vertical flat portion  20  centered at a horizontal line that bisects arc  16 . The flat portion  20  comprises four, parallel, horizontal through-holes  21 ,  21 ′,  21 ″, and  21 ′″ (which are oriented perpendicular to inner diameter surface  96  of arc  16 ) for holding four cap-head bolts  40 ,  40 ′,  40 ″, and  40 ′″ (not shown), that are received by threaded holes  92 ,  92 ′,  92 ″,  92 ′″ (not shown), respectively, in adjustment cylinder  28  (not shown). Support arc  16  further comprises a continuously-adjustable, rotatable arc segment  210  that rotates about the z-axis by sliding in a dovetail or T-slot type joint, which is held by a fixed, racetrack arc segment  220  (a dovetail joint is shown in  FIG. 29 ). The rotatable arc segment  210  can be secured at a selected, fixed circumferential position by, for example, a thumb screw (not shown). Alternatively, arc  16  could have a T-slot, or complementary grooves on both sides, or a raised ridge, or even rack and pinion gearing (not illustrated). 
       FIG. 30  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. The radius, R h , of the set of six threaded holes (holes #1-6) is defined by equation (1), as follows:
 
 R   h   ≥c+ 18  (1)
 
where, R h  and c are measured in mm. The dimension “c” is the diagonal distance of camera body  10 , as measured from the geometrical center “S” of sensor chip  12 . The circumferential angular locations of threaded holes #1-6 are constrained by two general equations that relate the four circumferential angles: β, ψ, θ, and ϕ (as measured in degrees). In equation (2), the sum of all of the angles over an entire sector must equal the sector&#39;s central angle, β, as follows:
 
2ψ+3θ+2ϕ=β  (2).
 
In equation (3), the sum of the interior circumferential angular spacing (θ) between two pairs of holes (holes #1 and #2, for example) plus the adjacent circumferential angular spacing (ϕ) between adjacent pairs of holes (holes #2 and #3, for example) must always equal 45°, as defined by equation (3):
 
θ+ϕ=45°  (3).
 
Angular constraint equation (3) is a necessary requirement to constrain camera mount  14  to be parallel to the horizontal x-axis when camera body  10  is positioned in the horizontal (landscape) position (as compared to mounting camera body  10  in the vertical (portrait) position). Additionally, constraint equation (3) is required to constrain camera mount  14  when tilted at 45° (i.e., when placed in the middle pairs of holes #3 and #4). In this example, the sector central angle, β=136°, and the circumferential angular offset for the first hole (hole #1), ψ=7°. The remaining angles are θ=32° and ϕ=13° (which sum to) 45°. These specific angles satisfy equations (2) and (3). The inner radius, R i , and the outer radius, R o , of arc  16  are not shown in this example.
 
       FIG. 31  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. In this example, the sector central angle, β=136°, and the circumferential angular offset for the first hole (hole #1), ψ=7°. The remaining angles are θ=32° and ϕ=13° (which sum to 45°). Vertical flat  20  is shown. The inner radius, R i , and the outer radius, R o , of arc  16  are identified in this example. 
       FIG. 32  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. Camera body  10  is mounted in the vertical (portrait) orientation using holes #1 and #2. Vertical flat  20  is shown. In this example, the sector central angle, β=136°, and the circumferential angular offset for the first hole (hole #1), ψ=7°. The remaining angles are θ=32° and ϕ=13° (which sum to 45°). 
       FIG. 33  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. Camera body  10  is mounted in the 45° tilted orientation using holes #3 and #4. Vertical flat  20  is shown. In this example, the sector central angle, β=136°, and the circumferential angular offset for the first hole (hole #1), ψ=7°. The remaining angles are θ=32° and ϕ=13° (which sum to 45°). 
       FIG. 34  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. Camera body  10  is mounted in the horizontal (landscape) orientation using holes #5 and #6. Vertical flat  20  is shown. In this example, the sector central angle, β=136°, and the circumferential angular offset for the first hole (hole #1), ψ=7°. The remaining angles are θ=32° and ϕ=13° (which sum to 45°). 
       FIG. 35  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. In this example, the sector central angle, β=130°, and the circumferential angular offset for the first hole (hole #1), ψ=5°. The remaining angles are: θ=30° and ϕ=15° (which sum to 45°). These specific angles satisfy equations (2) and (3). Note: the inner radius, R i , and the outer radius, R o , of arc  16  are not shown in this example 
       FIG. 36  shows an elevation rear view of another embodiment of a C-shaped support arc  16  and removable camera body  10 , according to the present invention. In this example, the sector central angle, β=136°, and the circumferential angular offset for the first hole (hole #1), ψ=8°. The remaining angles are θ=30° and ϕ=15° (which sum to 45°). These specific angles satisfy equations (2) and (3). The inner radius, R i , and the outer radius, R o , of arc  16  are identified in this example. 
       FIG. 37  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. Camera body  10  is mounted in the vertical (portrait) orientation using holes #1 and #2. Vertical flat  20  is shown. 
       FIG. 38  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. Camera body  10  is mounted in the horizontal (landscape) orientation using holes #5 and #6. Vertical flat  20  is shown. 
       FIG. 39A  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. In this example, the sector central angle, β=134°, and the circumferential angular offset for the first hole (hole #1), ψ=17°. The remaining angles are θ=10° and ϕ=35° (which sum to 45°). These specific angles satisfy equations (2) and (3). The small distance, b, between any given pairs of holes (e.g., holes #1 and #2) in this example makes the camera mount  14  less stiff when attached to arc  16  than the examples shown previously in  FIGS. 30-38 . The inner radius, R i , and the outer radius, R o , of arc  16  are not identified in this example. 
       FIG. 39B  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. Camera mount  14  with mounted camera body  10  are both positioned horizontally in a landscape orientation using holes #5 and #6. 
       FIG. 40  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. In this example, the sector central angle, β=135°, and the circumferential angular offset for the first hole (hole #1), ψ=11.25°. The remaining angles are θ=22.5° and ϕ=22.5° (which sum up to 45°). These specific angles satisfy equations (2) and (3). Note that holes #1-6 are evenly spaced apart circumferentially (i.e., because 0=ϕ in this example). Note also that 2ψ=22.5°, which is the same angle as θ and ϕ in this example (e.g., when β=135°). Note also that the inner radius, R i , and the outer radius, R o , of arc  16  are identified in this example. Note also that when θ=ϕ=22.5°, and ψ and β are unknown angles, it follows that equation (2) simplifies into equation (4) as follows:
 
2ψ+112.5=β  (4).
 
       FIG. 41  shows an elevation rear view of another embodiment of a C-shaped support arc  16 , camera mount  14 , and removable camera body  10 , according to the present invention. Camera body  10  is mounted in the horizontal (landscape) orientation using holes #5 and #6. Vertical flat  20  is shown. Note also that the inner radius, R i , and the outer radius, R o , of arc  16  are not identified in this example. 
       FIG. 42A  shows an elevation rear view of another embodiment of a view camera system  6  comprising a multi-position camera adapter assembly  8  and removable camera body  10  oriented at γ=56° to the horizontal x-axis (i.e., maximum-vertical mode), according to the present invention. When sensor chip  12  is oriented at γ=56° to the horizontal x-axis, a vertical diagonal (i.e., line “m-n”) that cuts vertically across the sensor maximizes the sensor&#39;s exposure to images aligned in the vertical direction (e.g., the Washington Monument). This angular orientation (γ=56°) puts the longest diagonal length=43.27 mm of a 24×36 mm DSLR sensor  12  exactly on the Y-axis without having to tilt the tripod 12 degrees more from 45 degrees and then having to deal with any resulting yaw angle. 
       FIG. 42B  shows an elevation rear view of another embodiment of a view camera system  6  comprising a multi-position camera adapter assembly  8  oriented at γ=56° to the horizontal x-axis (i.e., maximum-vertical mode), according to the present invention. 
       FIG. 42C  shows an elevation rear view of another embodiment of a view camera system  6 , according to the present invention. Additional threaded mounting holes  300  and  300 ′ are shown, which correspond to γ=56° orientation of mount  14 . 
       FIG. 43A  shows an elevation rear view of another embodiment of a view camera system  6  comprising a multi-position camera adapter assembly  8  and removable camera body  10  oriented at γ=34° to the horizontal x-axis (i.e., maximum-horizontal mode), according to the present invention. When sensor chip  12  is oriented at γ=34° to the horizontal x-axis, a horizontal diagonal (i.e., line “o-p”) that cuts horizontally across the sensor maximizes the sensor&#39;s exposure to images aligned in the horizontal direction (e.g., horizon, lakeshores). This angular orientation (γ=34°) puts the longest diagonal length=43.27 mm of a 24×36 mm DSLR sensor  12  exactly on the X-axis without having to tilt the tripod 12 degrees more from 45 degrees and then having to deal with any resulting yaw angle. 
       FIG. 43B  shows an elevation rear view of another embodiment of a view camera system  6  comprising a multi-position camera adapter assembly  8  oriented at γ=34° to the horizontal x-axis (i.e., maximum-horizontal mode), according to the present invention. 
       FIG. 43C  shows an elevation rear view of another embodiment of a view camera system  6 , according to the present invention. Threaded mounting holes  402  and  402 ′ are shown, which correspond to γ=34° orientation of mount  14 . 
     Note that in all of the embodiments of view camera systems disclosed herein that the camera mount  14  and/or support arc  16  can be configured (i.e., machined) by cutting slot(s), hole(s), or other openings such that mount  14  and/or arc  16  do not interfere with, or block access to, any items that protrude from camera body  10 , such as: electronic cable(s), battery compartment door(s), or memory card door(s). 
     Note that support arc  16  can be easily flipped 180° about the x-axis. Also, the rear L-frame  34  can be rotated 180° about the y-axis to put the upright vertical arm (standard)  30  on the East side; and arc  16  can be rotated 180° about the x-axis to position screw hole  26 ′ at the top. In this way, sensor  12  of camera body  10  can have the same distance from the lens board  70  along the z-axis as compared to the original (first) embodiment. 
     Note also that camera mount  14  can be manufactured as a mirror-image of itself (i.e., a “left-handed” version, as compared to the original “right-handed” version), which would allow the upright rear vertical arm (standard)  30  to be rotated 180° about the y-axis, thereby placing the camera body  10  on the East side of the view camera system  4 , while still properly facing camera body  10  (i.e., sensor  12 ) towards the front standard  34 ′ and front lens  72 . 
     Another embodiment of the present invention is as a modular system. The camera body  10 , bellows  78 , hose clamps  76  &amp;  76 ′, sealing rings  82  &amp;  82 ′, front lens board  70 , and front lens  72  can be easily switched out as a single module for a different body/bellows/lens module with a few quick movements: unplug the cables, loosen the thumb screw, and unsnap the lens board. It is similar to changing lenses on an SLR camera, except that it&#39;s better because a different camera body  10  (assuming roughly the same dimensions) can have a different sensor better suited to the lens to be put into use, i.e., a coarse-grain sensor  12  versus a fine-grain sensor  12 . 
       FIG. 44  shows an elevation side perspective view of an embodiment of a view camera system  3 , according to the present invention. View camera system  3  was made by a Swiss company “Sinar”, and has 5-axis movements that allow for tilt, swing, rise and fall, shift, and micro-focus adjustments. Camera system  3  comprises a DSLR camera body  10  attached to camera mount  14  using thumb screw  18 . Mount  14  is attached to support arc  16 , which is attached to rear mounting block  99  of view camera  3 . Support arc  16  is oriented horizontally, so that flat segment  20  rests horizontally flat against the top of rear mounting block  99 . Camera body  10  is oriented in the vertical (i.e., Portrait) orientation in this example. Camera body  10  is connected to front lens board  70  through flexible bellows  78 . Front lens board  70  (which is held by outer frame  79 ) holds shutter  110  and front lens  72 . Horizontal guide tube  38  (not shown) allows the distance between the front and rear mounting blocks  99  and  99 ′, respectively, to be adjusted. 
       FIG. 45  shows an elevation rear perspective view of an embodiment of a view camera system  3 , according to the present invention. View camera system  3  was made by a Swiss company “Sinar”, and has 5-axis movements that allow for tilt, swing, rise and fall, shift, and micro-focus adjustments. Camera system  3  comprises a DSLR camera body  10  (not shown) attached to camera mount  14  using thumb screw  18 , and mount  14  is attached to support arc  16 , which is attached to rear mounting block  99  of view camera  3 . Support arc  16  is oriented horizontally, so that flat segment  20  rests horizontally flat against the top of rear mounting block  99 . Horizontal guide tube  38  allows the distance between the front and rear mounting blocks  99  and  99 ′, respectively to be adjusted. 
       FIG. 46  shows an elevation side perspective view of an embodiment of a view camera system  3 , according to the present invention. View camera system  3  was made by a Swiss company “Sinar”, and has 5-axis movements that allow for tilt, swing, rise and fall, shift, and micro-focus adjustments. Camera system  3  comprises a DSLR camera body  10  attached to camera mount  14  using thumb screw  18 , wherein mount  14  is attached to support arc  16 , which is attached to rear mounting block  99  of view camera  3 . Support arc  16  is oriented horizontally, so that flat segment  20  rests horizontally flat against the top of rear mounting block  99 . Camera body  10  is oriented in the vertical (i.e., Portrait) orientation in this example. Camera body  10  is connected to front lens board  70  with flexible bellows  78 . Front lens board  70  (which is held by outer frame  79 ) holds shutter  110  and front lens  72 . Hose clamps  76  and  76 ′ attach the ends of bellows  78  to camera body  10  and front lens board  70 , respectively. Horizontal guide tube  38  allows the distance between the front and rear mounting blocks  99  and  99 ′, respectively to be adjusted. 
       FIG. 47  shows an elevation rear perspective view of an embodiment of a view camera system  3 , according to the present invention. View camera system  3  was made by a Swiss company “Sinar”, and has 5-axis movements that allow for tilt, swing, rise and fall, shift, and micro-focus adjustments. Camera system  3  comprises a DSLR camera body  10  attached to camera mount  14  using thumb screw  18 , wherein mount  14  is attached to support arc  16 , which is attached to rear mounting block  99  of view camera  3 . Support arc  16  is oriented horizontally, so that flat segment  20  rests horizontally flat against the top of rear mounting block  99 . Camera body  10  is oriented in the vertical (i.e., Portrait) orientation in this example. Camera body  10  is connected to front lens board  70  with flexible bellows  78 . Front lens board  70  is held by outer frame  79 . Horizontal guide tube  38  allows the distance between the front and rear mounting blocks  99  and  99 ′, respectively to be adjusted. 
       FIG. 48  shows a front elevation perspective view of an embodiment of a view camera system  2 , according to the present invention. The view camera system  2  comprises a wooden rectangular rear frame  34  and wooden rectangular front frame  34 ′ attached to a horizontal guide rail  38 , where the distance between the front and rear frames  34 ′ and  34 , respectively, is adjustable. This antique camera (originally called a “field camera”) was made by the Burke and James Company in the time frame of 1910 to 1940. The front frame  34 ′ holds a tiltable front frame  79  that holds a front lens board  70  with mounted front lens  72 . 
       FIG. 49  shows a rear elevation perspective view of an embodiment of a view camera system  2 , according to the present invention. The view camera system  2  comprises a wooden rectangular rear frame  34  and wooden rectangular front frame  34 ′ attached to a horizontal guide rail  38 , where the distance between the front and rear frames  34 ′ and  34 , respectively, is adjustable. This antique camera (originally called a “field camera”) was made by Burke and James in the time frame of 1910 to 1940. The support arc  16  with attached camera mount  14  is shown resting in a horizontal orientation on the bottom arm of rear frame  34 . In this example, camera body  10  is oriented at 45° to the horizontal axis; and camera body  10  is a Canon 1Ds-II DLSR.