H-4x
52mm grey neutral lens filter
LZOS, USSR
with box

Excellent condition. There are no scratches, cleavages, fungus. Box is original.

I took test photo with this filter set on "Jupiter-37A" lens and DSLR "Sony A-100". Test images are #4 (with filter) and #5 (without filter).

Lens "Jupiter-37A" is not included.

This filter has 52x0.75 mount and is designed for popular USSR lenses: Jupiter-37A, (MC) Helios-44M-4, 44M-5, 44M-6, 44M-7 and others.

Its task is to reduce the amount of light entering the camera in 4 times. 

It can be useful:
- when taking photo with opened aperture and a lot of light (for example, sunny day)
- when taking photo with long exposure (long shutter speed) to achieve the effect of washout (blur) of moving objects (water flow, clouds, cars, pedestrians, etc.)
- when making movie for washout (blur) of moving objects or fluent darkening.

Inside the box there is an inscription in Russian: "When using filter H-4x aperture must be changed to minus 0.5 steps".

Colour reproduction is not affected.
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Weight - 17 g (36 g with box)
Mount (mm) - 52x0.75
External size (mm) - 54x10
Box external size (mm) - 66x15