K-5.6x
52mm red lens filter
LZOS, USSR
with box

Excellent condition. There are no scratches, cleavages, fungus. Box is original.
Lens "Helios-44M" is not included and shown as an example of mount.

This filter has 52x0.75 mount and is designed for popular USSR lenses: (MC) Helios-44M-4, 44M-5, 44M-6, 44M-7 and others.
This is a classic red filter with strong power. When taking photo of landscapes this filter will eliminate haze at long distance. When taking pictures of flowers at black&white film this filter will intensify the contrast between green foliage and flowers.
Also this filter can be used to simulate the usage of infra-red film. Pictures taken at daylight will look like in the night.
If you need more powerful red filter, you can use K-8x which has stronger effect.

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Weight - 16 g (32 g with box)
Mount (mm) - 52x0.75
External size (mm) - 54x7 
Box external size (mm) - 65x13