ZhS-17
36mm yellow lens filter
LZOS, USSR

Very good condition. There are no cleavages, scratches or fungus. The metal rim has signs of use. Box is original and has signs of age.

Lenses "Industar-22" and "Industar-50" is not included and shown as an example of mount.

This filter has 36mm mount and is designed for popular USSR rangefinder lenses: "Industar-50" (both for rangefinder and SLR), "FED", "Industar-22" and others. Filter does not have a thread and is set on the lens with friction force only (close-up). So, if a lens has a strong dent, this filter is probably will not be fixed firmly.
The filter has three claws at the rim which regulate the lens capture. If necessary, bend them a bit inside and they will fix the filter firmly.
This is a classic yellow filter with strong power. Its aim is to weaken blue light and atmospheric haze. When taking picture of blue sky with clouds the filter intensifies contrast, blue sky becomes more gray. Also it strengthens the distinctness of far objects and contrast of shadows.
Yellow effect is expressed more when taking photo at natural light and less at artificial light.
If you need less powerful yellow filter, you can use ZhS-12 which has weaker effect.
If you need more powerful yellow filter, you can use ZhS-18 which has stronger effect.
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Weight - 9 g (20 g with box)
Mount (mm) - 36
External size (mm) - 37.5x8.5 
Box external size (mm) - 49x14