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RK 820 Stereomicroscope 
Stereomicroscope RK 820 
The stereomicroscope RK 820 enables the universal mono- and 
stereoscopic image evaluation of any kind of variable picture 
carriers. The viewing optics is equipped with standard elements 
for independent zooming, image rotation, and superimposition 
of pictures. The modular construction of the RK 820 enables the 
exchange of different supplementary lenses and eyepieces which 
is very favourable to the image evaluation in every case. Thus 
the evaluator can detect, identify, and interpret even the smal 
lest details by optimal magnification of the corresponding ob 
ject. This factor not only distinguishes the device within the in 
terpretation of aerial photos but also in the case of interpretation 
of satellite images and the preliminary steps for further image 
processing methods, excellent results have been achieved, too. 
Furthermore, the use of the RK 820 led to concerted work and 
time saving. The movable zoom arms permit the "separation" of 
conventional 70 mm, 5” and 9" images without cutting the film 
strip. 
As mentioned at the beginning, the RK 820 by Kern facilitates an 
image rotation by 360° which first of all is useful when viewing 
uncut filmstrips. Secondly, the stereo basis can be balanced since 
it is not always parallel to the photo line of flight. And thirdly the 
spatial observation effect can be increased by arranging room 
and body shadows in the image towards the evaluator. This 
favours and improves both the stereo effect and the spatial 
image representation. 
Female nude 
a) as stereophotograph 
b) as worked body profile