62 
Bui 2/1964 
b) Taking of photography with camera slaved to follow the apparent motion of the sky, so that 
stars are imaged as points and only the trajectory of the missile as a trace. The different arguments, 
particularly regarding the required lens apertures, the use of fine-grain emulsions, scintillation and 
the problems of tracking accuracy, are just as well-known as the problem of whether or not higher- 
order stars should be used. Exposure times of about 5 minutes will generally keep the influence of 
tracking errors small enough to dispence with fine corrections of the tracking motion. 
Fig. 1 BMK Ballistic Camera by Zeiss 
Fig. 2 
Photographic resolution. 460 mm Topar £/4.5, ne 
gative area 7%” X 7(4”, filter D. Film used: Ko 
dak SO 213 (12 ASA). Developer: Kodak D 19. 
Logarithmic contrast: 1.6. ISP standard illumination. 
Tested on: rotary collimator. Mean value of severaj 
lenses. 
It is beyond the scope of this paper to decide in how far the combination of telescope and camera 
will be appropriate or necessary for the different applications. It is natural that the overall system is 
considerably simplified if the respective refractor elements and possibly the tracking telescopes are 
eliminated. The camera support will then be less voluminous. In Figure 4, for instance, the refractor 
(with a focal length of 2500 mm) determines the mounting height of the camera by the vignetting 
effect of the telescope tube. Special attention was given to stability and a large basis of seating faces 
and shafts. Mounts for any desired polar altitude and diameters up to 1.20 m (e. g. for Super-Schmidt 
reflecting systems) are in preparation.