The Wild RC9 Super Wide Angle Camera 
In order to be able to use the Super Aviogon for vertical photography, the construction of a new 
aerial camera was necessary (Fig. 3). The large angular field of the lens makes it necessary to suspend 
the cone as low as possible in the supporting frame so that only a small camera port is necessary 
(Fig. 2). Since the camera is intended for the smallest picture scales, it will be used at considerable 
flight heights, and it therefore appeared advantageous to use a small view-finder telescope with an 
invalometer instead of the usual overlap regulator for correcting drift and for the exposure interval. In 
the RCY theidea ofa lightweight daylight loading cassette (Fig. 4) has been realised to lessen the weight 
of the camera and to simplify the film changing operation. The camera is equipped with special ex- 
changeable filters from pale yellow to light red, so that the photography can be fitted to the existing 
atmospheric and topographic conditions. The coated filter is provided with a colour-neutral graded- 
density filter, so that the best possible distribution of light is achieved in the picture plane. The lens 
can also be built for infrared photography: in this case a red filter is used, the lens being known as the 
Super-Infragon. The relative aperture is f:5.6. 
Fig.3 . RC9 Super Wide Angle Camera. 
  
Fig. 5 
Four horizon pictures are taken simultaneously 
on cine film by the Wild HC1 Horizon Camera. 
  
Fig.4 The RC9 is equipped with daylight-loading 
cassettes.