G-1.4x
52mm blue lens filter
LZOS, USSR

Excellent condition. There are no scratches, cleavages, fungus. Rim has signs of age.
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 blue filter with medium power, also it can be marked as "B-1.4x" or "CC-2". Its aim is to weaken red and orange light and to decrease the contrast of far objects.

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Weight - 17 g
Mount (mm) - 52x0.75
External size (mm) - 54x10