ZhS-17
27mm yellow lens filter
LZOS, USSR

Perfect condition. Fully operational. There are no cleavages, scratches or fungus.

Camera "Lubitel-2" is not included and shown as an example of mount.

This filter has 27mm mount and is designed for popular USSR medium format TLR cameras: "Lubitel", "Lubitel-2", "Lubitel-166" and others. This filter can be stored in interior compartment of "Lubitel", "Lubitel-2".

As the camera has two lenses, there is no need to have 2 filters. Firstly you set the filter to the upper (focusing) lens, watch into the waist level viewfinder and decide whether it's necessary to use it. Then you set it to the lower lens for taking picture.
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.

Characteristics:
Weight - 6 g
Mount (mm) - 27
External size (mm) - 29x7