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Slide For Canon 11-24mm f/4 USM Slots for 2 Rectangular Filters No vignetting * 77mm/82mm Adaptor Rings for NiSi 180mm Filter Holder (Canon 11-24mm f/4 USM) Sold Individually.

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Slide For Zeiss Distagon T* 15mm f/2.8 ZE Slots for 2 Rectangular Filters No vignetting