398 
/U.UesfoiA.es 
in the design 
of photogrammetric instruments 
After production of photogrammetric instruments 
had been resumed in West-German Zeiss Works, the 
high-performance 
ZEISS TOPAR LENS 
was developed. Excellent image resolution, superb 
illumination up to the very corners of the negative, 
color-corrected, maximum distortion of t4microns- 
these are the characteristics of pictures taken with 
our 8 1/4" Aerial Survey Cameras RMK 21/18 and 
2 x RMK 21/18 (Convergent Camera). 
ZEISS-AEROTOPOGRAPH MUNICH 
München 27/ Western Germany / Ismanmgerstr. 57 
with an aperture of f/5.6, for focal lengths of 4 1 /2" 
and 6”. Superb image resolution, 100% better illu 
mination in the corners as compared to the Topogon 
lens, maximum distortion of ± 4 microns make the 
Pleogon superior to all other lenses with an angular 
field of 100 9 . 
Full utilization of the excellent resolving power of 
the Topar and Pleogon high-performance lenses is 
guaranteed by the temperature-proof 
ZEISS AEROTOP SHUTTER 
Continuously rotating discs result in especially high 
light efficiency. Image movement largely eliminated 
through continuous setting of exposure times up to 
1/500 and/or 1/1000 sec. 
Of more than 200 Stereoplanigraphs over 60 are 
working with coordinate printing counter. The fact 
that each new series of 
C 8 STEREOPLANIGRAPHS 
is being equipped with this printing counter, has 
contributed to the extensive use of this instrument 
for large-scale high-precision photogrammetry and 
aerotriangulation. For topographic mapping at small 
and medium scales, the Stereotope has rendered 
excellent service in the photogrammetric practice. 
For detailed information write to: 
After the normal-angle Topar Lens, the creator of 
the Zeiss Topogon and his collaborators developed 
the wide-angle 
ZEISS PLEOGON LENS 
/YV\ 
ZEISS 
AEROTOPQ