Hoya 52mm Red/Blue Variable Circular Polarizer Glass Filter
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This filter is a combination of one gray polarizing filter and two colored polarizing filters.
•The color can be varied by rotating the filter frames.
•Available in five combinations: Y/B(yellow/blue), Y/G(yellow/green),Y/R(yellow/red), R/B(red/blue) and R/G(red/green) and in all popular sizes.