【Rapid Magnetic Attachment】This ND filter features magnets on the rim to easily attach to your camera lens within seconds. Connect the included magnetic adapter ring to your camera lens first, then place the filter near the ring and it will be magnetically attracted to secure in position | 【HD Variable ND Filter】The variable neutral density filter combines five filters in one (ND2-ND32). Simply 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. By controlling the light entering your camera lens, this high definition ND filter helps balance image exposure and offers more control over shutter speed and aperture, without compromising image quality | 【Optical Glass Build with no "X" Cross】Built with high definition AGC optical glass and aluminum alloy frame, the only 7.4mm thick filter ensures original color reproduction with no vignetting. The filter utilizes frame self lock technology to eliminate the “X” cross on the photo image | 【Multi Layer Nano Coatings】The dual sided 30 layers of Nano coatings make the filter water repellent, oil proof and scratch resistant. The multi coated filter also effectively reduces glare and reflections and delivers natural photo look | 【What this 49mm Lens Filter Includes】This filter kit contains one magnetic ND2-ND32 variable filter and one magnetic adapter ring. The filter is only compatible with 49mm camera lens. A 52mm lens cap is required to fit on this 49mm filter. Please check your lens filter thread size first (marked with the "ø" (diameter) symbol)