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Picture 1. Photographic air survey camera AFA-TK-10/18 
The process of increasing the scales of air photographic survey 
leads to a necessity of decreasing the value of forward motion of 
photographic image, originated by movement of the aircraft. Along 
with decreasing the exposure time and reduction of aircraft speed 
the most, efficient way of getting the success is application of 
forward motion compensation (F.M.C.). Application of this device 
allows to use high resolution low sensitive photographic films and 
so to better the quality of air photographic images.Besides the ap 
plication of forward motion compensator allows to increase opera 
tional capabilities of the photographic camera by widening survey 
time with application of longer exposures. 
Modernized objective HUSSAR-71 is used in photographic camera 
AFA-TK-10/18. This objective was well experiensed in the previous 
serial cameras AFA-TES-10 (AFA-TEA-10).In the modernized version of 
the objective the levelling glass which was situated in the pic 
ture surface of RUSSAR-71 objective is changed by protective glass 
situated directly after the last objective lens.The interior sur 
face of protective glass is shaded and so is protected from the am 
bient influence. As the result there is no need in shading each 
light fiIter which the air camera is equipped with. 
An elimination of the levelling glass allowed to apply in AFA- 
TK-10/18 photographic camera the vacuum method of photofilm level 
ling. By that method a negative pressure upon surface of pressing 
table is made by vacuum pump integrated in the conical part of the