Description: Illustration of an OpticalTheodolite in U.S. Army Field Manual. Source: http://atiam.train.army.mil/portal/atia/adlsc/view/public/297107-1/fm/3-34
Photographic Azimuth Compass (Photographic "Azimutale'
)
D. Photogrammetric Theodolite of Prof. S. Finsterwalder
E. Phototheodolite for Precige Work, by O. Ney