Source: {"pile_set_name": "USPTO Backgrounds"}

The present invention relates generally to photography apparatus and more particularly to an assembly for performing close-up and copy photography of an object.
Until the present time, close-up and copy photography of the type contemplated herein has required the use of a bellows device. Because such a bellows device is normally used in conventional apparatus, it is difficult to achieve an operative association between an exposure control signal from a camera which is utilized with the device, and which is mounted on a side of the bellows device, and a diaphragm device of the photography apparatus located on a side of the bellows device. Because of the shortcomings involved with the utilization of a bellows device it is difficult to effect the desired photography operations with automatic exposure control such as automatic control of the aperture of the lens by means of an exposure control signal from the camera. Furthermore, in apparatus utilizing a bellows device, when the magnification ratio is to be varied, the total length of the photography apparatus including the camera, the bellows and the lens system, must be varied. As a result, the copy stand which supports the photography apparatus must be constructed to be sufficiently rigid to enable the required adjustment. Thus, in order to effect magnification adjustment there will arise troublesome adjusting procedures and the framing and focusing operations can only be effected by incurring significant inconvenience.
In a photography assembly of the type described utilized for close-up or copy photography the camera and the photographing lens are arranged respectively upon opposite sides of the bellows body and the entire apparatus is mounted on a support pole or stanchion of a copy stand with the total length of the photography apparatus being varied depending upon the magnification ratio which must be achieved to produce an adjusted image of the object to be photographed. Thus, in the case of such a bellows device, the overall procedure, including especially the change in magnification ratio, tend to involve troublesome efforts and inefficient operations. A primary purpose of the present invention is to provide a close-up and copy photography system which may be operated more efficiently and with greater ease of operation.