Abstract:
A camera stabilizer includes a grip for cameras that provides for stability of the camera without a shoulder mount or shoulder mount harness. The current camera stabilizer attaches around the arm of the user then extends through a member roughly parallel to the forearm to a grip that is held by the user. The grip is attached to the member by a ball joint that allows free positioning of the grip relative to the member but may then be locked in position for use. The camera is then attached to the grip. This allows the user to stabilize the camera by holding the elbow closer to the torso, by resting the elbow on a steady object, or by simply flexing the wrist which applies tension to the member thereby providing a more stable grip on the camera and a resulting more stable picture. A kit is also disclosed that includes the camera stabilizer and a harness for tethering the camera stabilizer to a camera operator.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of and priority to U.S. Provisional Patent Application 61/339,295 filed Mar. 1, 2010, the contents of which are hereby incorporated herein by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. The Field of the Invention 
     The present invention relates to a stabilizing support for cameras. More particularly the invention relates to an ergonomic and portable stabilizing support device designed to reduce camera operator arm fatigue and unwanted shaking from hand held motion picture camera recordings and handheld still photography. 
     2. The Relevant Technology 
     Over the past twenty five years new technology has allowed video cameras to evolve from bulky shoulder-supported cameras to the light-weight and compact single-unit multi-purpose camera and recorder of today. The size of these dual-use camera/recorders has quite simply revolutionized the acquisition of motion pictures. For example, in a modern standard-looking 35 millimeter camera form factor an operator can capture high-definition digital video as well as the high quality digital still photography using replaceable lenses. 
     As these motion picture cameras become smaller and smaller in size and weight, these cameras have also become more maneuverable. This increase in maneuverability enables image capture from different angles and positions than that which would have been available using a conventional shoulder supported video camera. In fact, using the video camera of twenty years ago, the operator of the camera was extremely limited to a small selection of angles and positions that were available with the cumbersome arrangement of the shoulder-supported camera. 
     However, due to their small size such hand-held cameras of today have an inherent problem of producing a poor quality recording and picture as a result of the unstable hand movement of the operator as opposed to the more stable shoulder-supported cameras of the past. In fact, many veteran camera operators would agree that it is virtually impossible for even the most skilled camera operator to obtain high-quality motion picture recordings with a modern off the shoulder hand-held camera. In addition, the tendency to move the wrist, hand and arm when manipulating the controls and focusing the small hand-held camera results in further unwanted movement in the recording. 
     While tripods can eliminate this problem for off the shoulder hand-held cameras, tripods generally defeat many of the primary advantages of the portable hand-held camera by reducing its portability. And, in scenarios where the camera operator is in motion, tripods generally do not lend much stabilization assistance whatsoever. Therefore, even though use of a tripod has advantages in certain situations, tripods are not used when the camera is hand held. 
     Even the stabilizing chips that are present in many camcorders today do not entirely eliminate the jittery movements that cause poor quality image capture recording. And, such stabilizing chips do nothing to lower, or prevent, arm fatigue as the duration of continuous recordation continues. 
     Many of the same problems are inherent in still photography as well. This is especially the case in lower light situations where longer exposure times are necessary. Handheld still photography encounters similar problems at high zoom factors where small hand movements are magnified and often result in blurred photographs. 
     Prior attempts have been made to eliminate the shaky and unwanted motion typical in image capture through various stabilization mechanisms. Those previous attempts have been bulky, inadequate, or have interfered with camera functionality and the portability advantages realized with smaller handheld devices. Most of these prior attempts also rely on resting a support on the operator&#39;s shoulder, which negates the advantages of the small portable camera as discussed above. Shoulder mount camera support systems also limit the shots available, since the operator&#39;s whole body becomes the platform and the intended platform is limited to the shoulder of the user. 
     Therefore, what would be advantageous is a portable camera-stabilizing device that is comfortable, easily maneuverable for use in many different recording positions, provides access to camera controls, and effectively reduces, or eliminates, unwanted movement in motion picture capture and still photography. Moreover, what would also be advantageous is a camera stabilizer that ergonomically mimics the natural movement of the arm and wrist of the operator without inhibiting the angles, positions, and movement of the camera that the photographer or videographer would prefer to use if-not for fatigue and shaky movement that results thereby. 
     The subject matter claimed herein is not limited to embodiments that solve any disadvantages or that operate only in environments such as those described above. Rather, this background is only provided to illustrate one exemplary technology area where some embodiments described herein may be practiced. 
     BRIEF SUMMARY OF THE INVENTION 
     The present invention relates to a camera stabilizer for stabilizing a motion image capture or still camera while recording motion pictures or still photos. The camera stabilizer can include a camera mount having a first side and a second side, the first side including means for attaching the camera mount to the camera. The camera stabilizer can include a grip connected to the second side of the camera mount, the grip being sized and shaped to be held in the palm of a human hand. The camera stabilizer can include a joint attached to the grip. The camera stabilizer can include an arm piece connected with the joint, the arm piece extending substantially the length of the human forearm. The arm piece can include a distal end connected to the joint so as to be pivotally connected to the grip and a proximal end. The camera stabilizer can include a forearm brace located at the proximal end of the arm piece, the forearm brace configured to at least partially encircle a human forearm proximate to the human&#39;s elbow. 
     The present invention further relates to a kit including the camera stabilizer and a harness, wherein the harness connects the camera stabilizer to the torso of a human via the harness. 
     Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The features and advantages of the invention may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       To further clarify the above and other advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which: 
         FIG. 1  illustrates a camera stabilizer for stabilizing a motion picture or still camera while recording motion pictures or still photos in a retracted position; 
         FIG. 2  illustrates the camera stabilizer for stabilizing a motion picture or still camera while recording motion pictures or still photos in an extended position; 
         FIG. 3  illustrates a first position of which the camera stabilizer may be used where a camera operator is holding the camera stabilizer in his right hand with a camera attached thereto; 
         FIG. 4  illustrates a position of which camera stabilizer and the camera are held at the camera operator&#39;s waist and the camera operator watches a screen display that is disposed on the rear of the camera; 
         FIG. 5  illustrates a position where the camera stabilizer is being used to place the camera at a position above the head of the camera operator; 
         FIGS. 6 and 7  illustrate how the camera operator can use the camera stabilizer as a monopod using the camera operator&#39;s leg or a table for support; 
         FIG. 8  shows the camera stabilizer being used as an extension of the camera operator&#39;s arm by the camera operator holding the forearm brace and extending the camera toward the ground; 
         FIG. 9  illustrates a kit that includes the camera stabilizer and a harness; and 
         FIGS. 10A and 10B  illustrate front and back depictions of the harness respectively on a camera operator without the camera stabilizer. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present invention is directed to a camera stabilizer. The camera stabilizer is an ergonomically designed camera support and stabilization device which mechanically distributes the weight and tension felt by the hand holding the camera to the forearm and upper arm of the camera operator so as to reduce, or eliminate, the fatigue and shakiness often experienced during operation of the camera. The camera stabilizer is also designed to liberate a camera operator by enabling the use of positions and angles for image capture that the camera operator would not otherwise be able to use due to arm fatigue and the undesired shaky motion caused thereby. 
     In addition to the camera stabilizer&#39;s use as a stabilization brace between the hand and forearm, the stabilizer&#39;s design and functionality further enables new angles and positions for the camera user that would not be available but for the camera stabilizer. For example, when not used as a brace, the camera stabilizer can selectively be used as a monopod to provide a stabilizing platform for the camera. In addition, the position of the camera and stabilizer can be fixed in place so as to use the camera as an extension of the operator&#39;s arm so as to place the camera in angles, positions and locations for the camera operator that would not otherwise be available without the camera stabilizer. 
     The present invention is also directed to a camera stabilization kit that includes such camera stabilizer and a harness, or sling. The harness can include a looped restraint that tethers the camera stabilizer to the camera operator&#39;s torso and supports the camera stabilizer in a bodily supported position so as to further reduce fatigue and unwanted movement as a result of prolonged use felt by smaller bodily muscles of the arms. 
     The harness can include a pouch within which a proximate portion of the camera stabilizer is held so as to provide a torso supported stability point from which the weight of the camera and camera stabilizer is supported. As such, this stability point can be a pivot point to which the camera stabilizer can act as a weight supported monopod for further stabilizing the camera. The harness can also include a strap that connects to a distal end of the camera stabilizer for providing further stabilization of the camera and further reducing fatigue and stress felt by the camera operator. When used in conjunction with a harness included with the kit, the camera stabilizer can further liberate the camera operator by at least partially providing the support structure for the camera thereby allowing a hand of the operator to be used for camera control adjustment rather than being used for camera support. 
     Referring to  FIG. 1 , a camera stabilizer  100  is shown for stabilizing a motion picture camera or still camera while recording motion images or still photos. The camera stabilizer  100  includes a camera mount  105  having a first side  110  and a second side  115 . The first side  110  of the camera mount  105  including means for attaching the camera mount to a camera. The means for attaching the camera mount to a camera includes a detachable mounting plate  120  with a bolt, or thumbscrew,  125  to hold onto the camera. The standard threading for the bolt  125  that attaches the camera to the camera stabilizer  100  is ¼″-20 tpi (threads per inch) British Standard Whitworth (Whitworth or BSW) for smaller cameras or ⅜″-16 tpi BSW for larger cameras and pan/tilt heads. 
     The camera stabilizer  100  further includes a grip  130  connected to the second side  115  of the camera mount  105 . The grip  130  is sized and shaped to be held in the palm of a human hand. The camera mount  105  allows connection to a camera or camcorder (not shown) to the grip  130  and thus to the camera stabilizer  100 . 
     In  FIGS. 1 and 2 , the camera mount  105  is shown with the mounting plate  120  that is lockingly removable from the camera mount  120 . The mounting plate  120  may be attached to the bottom of a camera (not shown), and then the locking plate  120  attached to the camera engages the camera mount  105 . This allows the camera to be lockingly and reversibly mounted to the camera stabilizer. This mounting plate  120  can be the same type of locking plate as is common with tripods and other camera mounts known in the art or can be a different locking plat then commonly used. 
     The camera stabilizer further includes a joint  135  coupled to the grip  130 . The joint  135  can have at least two degrees of rotational freedom. Preferably the joint  135  includes a ball joint including a bearing stud  140  and socket  145  as shown in  FIGS. 1 and 2  with three degrees of rotational freedom including tilting forward and backward  150 A, tiling left and right  150 B, and tilting side-to-side  150 C. 
     As shown in  FIGS. 1 and 2 , the socket is disposed within the grip in between the first and second ends of the grip such that the socket is held in substantially the center of the palm of a human hand when in-use. 
     The camera stabilizer further includes an arm piece  150  connected with the joint  135 . The arm piece  150  extends substantially the length of the human forearm. The arm piece  150  includes a distal end  155  connected to the joint  135  so as to be pivotally coupled to the grip  130 . The arm piece  150  also includes a proximal end  160 . The arm piece  150  includes a substantially straight section  165  which extends along a length of a human forearm when in use and a curved section  170  which extends at one end of the arm piece  150  so as to connect with the joint  135  pivotally coupled to the grip  130 . 
     The substantially straight section  165  of the arm piece is fixedly adjustable in length such that the distance between the distal end  155  and the proximal end  160  of the arm piece  150  is adjustable as can be understood by a comparison of the arm piece  150  in  FIG. 1  in its retracted position and arm piece  150  in its extended position. For example, the arm piece  150  can include a releasable lock  175 , or clip, which retains the arm piece  150  in the extended position of  FIG. 2 , in the retracted position of  FIG. 1 , or in any position there between by releasing the lock  175 , manually adjusting the length of the arm piece  150  by sliding a first relatively small diameter portion  180  into and out of a second relatively large diameter portion  185  and engaging the lock  175  at the desired position so as to fix the desired length of the arm piece  150  associated with the length of the arm of the camera operator. The lock  175  can also be partially engaged so as to frictionally impair movement of the distal end relative to the proximal end but not fully prevent movement along its length. 
     While the camera stabilizer  100  shown in  FIGS. 1 and 2  is designed for a camera operator who generally holds the camera in the right hand, one of ordinary skill will understand in view of this disclosure that a similarly configured left-handed version is also envisioned herein. A left handed camera stabilizer is almost identical to that shown in  FIGS. 1 and 2  except that the arm piece attaches to the joint on the right side of the grip such that the curved portion of the arm piece extends out and away from the palm of the left human hand and curves back along the forearm and toward the elbow as shown in  FIGS. 1 and 2  for a right-handed camera stabilizer  100 . 
     The camera stabilizer  100  further includes a forearm brace  190  located at the proximal end  160  of the arm piece  150 . The forearm brace  190  is configured to at least partially encircle a human forearm proximate to the human&#39;s elbow. As shown in  FIGS. 1 and 2  the forearm brace  190  includes a substantially ridged and curved section  195  connected to the proximal end  160  of the arm piece. The forearm brace  190  further includes an adjustable strap  200  configured to hold the forearm securely against the ridged and curved section  195  of the arm band when in use. And the curved section may be fitted with foam padding as shown, or shaped so as to distribute torsional force over the operator&#39;s forearm. Thus, the forearm brace  190  is configured to securely encircle the human forearm when in use such that the forearm brace  190  counteracts torsional forces to the forearm brace  190  in any direction in response to manipulating the grip  130  in any number of different directions. 
     The joint  140  includes means for increasing and decreasing mobility of the joint. For example, the joint  140  can include a variable friction clutch for increasing and decreasing the level of mobility of the joint. For example, as shown in  FIGS. 1 and 2  the variable friction clutch can include a locking plate  205  that forms at least part of the socket  145  within which the ball stud  140  is received and rotates. The locking plate  205  can include a first end  210  that is received within a slot  215  in the handle  130  so as to pivotally fix the locking plate  205  at one end such that the locking plate  215  only has one degree of rotation about the pivot point formed by the slot  215  and first plate end  210  engagement. The second end  215  of the locking plate  205  can have a hole (not shown) through which a tensioner  220  extends. The tensioner  220  can be in the form of a screw, or dial, that screws into and out of the handle  130  so as to increase and decrease bias against the second end  215  of the locking plate  205  thereby increasing and decreasing pressure placed on the ball stud  140  by the locking plate  205 . As a result, friction between the locking plate  215  and the ball stud  140  is increased and decreased thereby increasing and decreasing mobility of the joint  135 . 
     The camera stabilizer  100  can also include means for locking the joint in a fixed position. For example, the joint can include a trigger  225 , lever, clip or other locking feature for securing the position of the joint  135  so as to retain the location of the grip  130  and camera with respect to the position of the arm piece  150  in a locked relative position so as to maneuver the camera stabilizer  100  without changing its relative positional configuration. For example, the grip  130  can move by depressing trigger  225  which unlocks the ball joint  135 . By releasing the trigger  225 , or other locking device, the grip  130  locks into the position in relation to the arm piece  150  needed by the operator. 
     Squeezing the trigger  225  can also activate an internal spring (not shown) that releases a locking force on the joint  135 , allowing the joint  135  to move freely or to move with a frictional impairment, as desired. The amount of friction remaining on movement of the ball joint upon activation of the trigger  225  may be controlled by a friction control device incorporated into the grip  130 . When the ball joint  135  and grip  130  are in the desired position, the trigger  225  is released, re-locking the ball joint  135  in the newly-assumed position. With this type of locking mechanism, the adjustment of the camera stabilizer  100  may be achieved in one-handed fashion by the hand holding the camera stabilizer  100 , even in the middle of shot. 
     The trigger  225  may be omitted as well where the tensioner  220  is used to substantially lock the joint  135  in place by creating enough pressure on the locking plate  205  so as to effectively increase the static friction between the locking plate  205  and the ball stud  140  such that the ball stud  140  is prevented from moving within the socket  145 . 
     The grip may also be modified to include a set of controls  230  to control the camera mounted to the camera mount  105 . Such a set of grip  130  mounted controls  230  allows the user to control those aspects of the camera or camcorder normally accessed by the hand gripping the camera without a camera stabilizer  100 . For example, to start and stop recording, take a photo, and zoom in and out an operator can manipulate the controls  230  using a thumb or some other finger holding the handle  130 . 
     Also, while a ball joint has been depicted to provide the greatest degree of movement of the grip relative to the arm piece  150 , it is understood in view of these teachings that other mechanisms may be provided to replace the ball joint  135 , and that the ball joint  135  can be replaced with a fluid head connection, if desirable. Other types of joints can be used, such as a gimbal head, a gear head, an alt-azimuth, and an equatorial head. Fluid joints and gear joints move smoothly, avoiding the jerkiness caused by the stick-slip effect found in other types of joints. Other types of manufactured joints can also be incorporated such as ball head camera mount joints which include a tensioner screw with a cone on the end which biases against a ball joint to prevent movement thereby. Such manufactured joints can also be used in place of the ball joint configuration of  FIGS. 1 and 2 . However, as disclosed herein ball joint  135  allows for three degrees of rotational freedom and is relatively easily manufactured. 
     When not in use, the camera stabilizer  100  is able to fold at the ball joint  135  so as to provide a compact and streamlined form for storage. To further provide for compactness of storage, a portion of the arm piece  150  may be bent to allow more complete collapsing at the ball joint  135 . Alternatively, the camera stabilizer  100  may be separable into components, so that the grip  130  and ball joint  135  may be removed from the arm piece  150  and forearm brace  190  for storage. This allows the use of the components of the camera stabilizer  100  with other equipment, or allows switching out of camera stabilizer  100  components, such as to change the size of the arm piece  150  or forearm brace  190  for different situations and users. As one example, in some instances the user might remove the ball joint  135  and grip  130  and attach the ball joint  135  and grip  130  to a tripod for a tripod-mounted shot. 
     As shown in  FIG. 2 , the camera stabilizer  100  can include a gyroscope  235  disposed  100  for helping further reduce shakiness and unwanted abrupt changes of orientation of the camera. For example, the gyroscope  235  can be disposed on the bottom side of the grip  130 . A gyroscope is a device for measuring or maintaining orientation, based on the principles of conservation of angular momentum. 
     A mechanical gyroscope, for example, is essentially a spinning wheel or disk whose axle is free to take any orientation. This orientation changes much less in response to a given external torque than it would without the large angular momentum associated with the gyroscope&#39;s high rate of spin. Since external torque is minimized by mounting the device in gimbals, its orientation remains nearly fixed, regardless of any motion of the platform on which it is mounted. Within mechanical systems or devices, a conventional gyroscope is a mechanism comprising a rotor journalled to spin about one axis, the journals of the rotor being mounted in an inner gimbal or ring, the inner gimbal is journalled for oscillation in an outer gimbal which is journalled in another gimbal for a total of three gimbals. 
     The outer gimbal or ring which is the gyroscope frame is mounted so as to pivot about an axis in its own plane determined by the support. This outer gimbal possesses one degree of rotational freedom and its axis possesses none. The next inner gimbal is mounted in the gyroscope frame (outer gimbal) so as to pivot about an axis in its own plane that is always perpendicular to the pivotal axis of the gyroscope frame (outer gimbal). This inner gimbal has two degrees of rotational freedom. Similarly, next innermost gimbal is attached to the inner gimbal which has three degrees of rotational freedom and its axis possesses two. 
       FIG. 3  illustrates a first position of which the camera stabilizer  100  may be used where the camera operator  300  is holding the camera stabilizer  100  in his right hand with a camera  305  attached thereto. The forearm brace  190  of the camera stabilizer  100  is secured to the operator&#39;s forearm  310  and the camera operator  300  holds the camera  305  near his face to look through the camera viewfinder or to view what is displayed on an LCD screen of the camera  305 . 
     Referring to  FIG. 4  is another position of which camera stabilizer  100  may be used. In this position the camera  305  is held at the camera operator&#39;s  300  waist and the camera operator  300  watches a screen display that is disposed on the rear of the camera  305 . In this position the images may be captured from a lower angle and different physical position than in the  FIG. 3 . 
     The position depicted in  FIG. 4  can be particularly advantageous where the camera operator is standing and can walk while recording someone at eye level who is sitting. Or, for example, for recording children at eye level while the camera man is moving. The position shown in  FIG. 4  would not be possible using a shoulder supported camera as the camera operator would be required to crouch down and experience increased fatigue by such limitations. 
     Referring to  FIG. 5 , the camera stabilizer  100  is being used to place the camera  305  at a position above the head of the camera operator  300  where the camera operator  300  can view what is being recorded from the LCD display on the back of the camera  305 . 
     Similarly, using the camera stabilizer along with the camcorder flip-out view screen, the videographer may make shots backward over his or her opposite shoulder, or to the side. These shot angles are facilitated by the extreme flexibility of the ball joint. Without the camera stabilizer, such shots are limited to the amount the user&#39;s hand will turn, or require removing the user&#39;s hand from the camcorder strap and fumbling with turning the camera around. This fumbling may lead to unwanted interruption of the shot, or unwanted shaking during the turning maneuver. In this way, the camera operator may make continuous fairly-steady shots to the side or back while walking and may even be discreet while doing so. 
     As can be appreciated by a review of  FIGS. 3-5  the camera stabilizer  100  allows use of the smaller camera  305  of today in a multitude of different positions and angles than that which would be available using a shoulder mounted camera of the past. And, with the camera stabilizer  100  reduced shake and jitter is also achieved using the smaller camera of today. 
     In addition to its use as a camera stabilizer as shown in  FIGS. 3-5  the camera stabilizer  100  can also act as a monopod thereby offering additional stability use when not secured to the arm of the camera operator  300 . For example,  FIGS. 6 and 7  illustrate how the camera operator  300  can use the camera stabilizer  100  as a monopod using the camera operator&#39;s  300  leg  315  or a table  320  for support. The stabilizer arm can also be adjusted as shown by a comparison of  FIGS. 6 and 7  so as to place the camera at the desired height depending on the level of the support. 
     The camera stabilizer  100  can also be used as an extension to the camera operator&#39;s  300  arm so as to allow camera positions and angles that would not otherwise be available but-for the camera stabilizer  100 . For example,  FIG. 8  shows the camera stabilizer  100  being used as an extension of the camera operator&#39;s  100  arm by the camera operator holding the forearm brace  190  and extending the camera  305  toward the ground thereby enabling additional positions and angles not otherwise available without the camera stabilizer  100  and further emphasizing the maneuverability of the cameras of today. Similarly the camera stabilizer  100  can be used to extend the camera  305  further above the head of the camera operator thereby enabling the camera operator to capture picture and video over crowds, for example. 
     Referring to  FIG. 9 , a kit is illustrated that includes the camera stabilizer  100  and a harness  900 . The harness  100  connects the camera stabilizer  100  to the torso of a camera operator  300  via the harness. The harness  900  includes a plurality of straps  905  that encircle the torso of the camera operator  300  and physically couple the torso of the camera operator  300  with the camera  305  via the camera stabilizer  100 . 
     The harness can include a holder  910  that holds the forearm brace of the camera stabilizer  100  near the waist of the camera operator  300 . The harness  900  can also include an adjustable elastic strap  915  that connects to the distal end  170  of the arm piece  150  to a strap  905  of the harness  900  near the shoulder or neck of the camera operator  300  wearing the harness. Therefore, the harness  300  provides a further option to support the camera  305  using the camera operator&#39;s  300  torso more closely akin to the shoulder supported cameras of the past if the camera operator  300  so desires. 
     The position depicted in  FIG. 9  can also be lowered similar to  FIG. 4  with adjustment to the length of the elastic strap, if needed, such that the camera is held in a lower position toward the waist. As discussed above, this position can be particularly advantageous where the camera operator is standing and can walk while recording someone at eye level who is sitting. Or, for example, for recording children at eye level while the camera man is moving. The position shown in  FIG. 4  would not be possible using a shoulder supported camera as the camera operator would be required to crouch down and experience increased fatigue by such limitations. 
       FIGS. 10A and 10B  illustrate front and back depictions of the harness respectively on a camera operator  300  without the camera stabilizer  100  so that one of ordinary skill in the art might understand one way that the harness may be configured to be tethered to the torso of the camera operator  300 . 
     The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.