a few. 
To simplify the entire process of data acquisition and 
data reduction, the current stereometric cameras are generally 
limited to the condition of the 'inormal case'' of stereo- 
photogrammetry (Fig. 1). Among the commercially available 
stereometric cameras are: WILD C-120, WILD C-40, ZEISS SMK-40, 
ZEISS SMK-120, GALILEO-SANTONI Veroplast, GALILEO-SANTONI 
Tecnoster, GALILEO-SANTONI Verostat, and ZEISS (Jena) 2/0504. 
Table | lists some of the features of these stereometric cameras. 
Fig. 1 = The ''normal case' of photogrammetry -- Camera axes 
parallel and orthogonal to the base.