ROLANPRO Waterproof Lens Cover for Canon RF 70-200mm F2.8 L IS USM-27#. This rear lens filter kit contains four neutral density filters; ND 0.9 (3 Stop), ND 1.2 (4 Stop), ND 1.8 (6 Stop), ND 3.0 (10 Stop), and a dedicated adapter ring.
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