An included magnetic adapter ring secures to your lens, and this 55mm Magnetic Variable ND Filter magnetically attaches to the adapter. Rotate the filter frame to choose from ND2, ND4, ND8, ND16, or ND32 as indicated by the markers on the frame, and reduce light exposure by 1-5 stops. The filter is made with high definition AGC optical glass and an aluminum frame. It's 7.4mm thick and ensures original color reproduction with no vignetting. The filter uses frame self-lock technology to eliminate the " X" cross on the photo image. Dual-sided multicoating makes the filter water-repellent, oilproof, and scratch-resistant, while also helping reduce glare and reflections.
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