Soviet USSR Yellow filter ZS-17  ЖС-17 D32mm LZOS 

The filter was made at the Lytkarino Optical Glass Plant (LZOS), USSR.The inner diameter of the filter is 32mm. 

A yellow light filter, medium in density, is used for correct tone reproduction.In a landscape, a yellow filter emphasizes white clouds in a blue sky more strongly, weakens air haze, enhances the clarity of distances, and increases contrast in shadows.

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