The Genustech Eclipse ND Fader (52mm) is a variable neutral density filter for photographers and videographers who want to fine-tune exposure without swapping fixed-density filters mid-shoot. It's built for anyone shooting in bright light who needs to slow shutter speed or open aperture for creative effect. Approximately 2-8 Stops of ND: Rotating the filter lets you dial in the amount of light entering the lens across a wide adjustable range. 52mm Filter Thread: Sized for lenses with a 52mm front thread, with a wider front element that minimizes vignetting on wider lenses. Laser-Calibrated Optics: New laser technology is used to improve color fidelity and sharpness compared to competing variable ND filters. Note: do not use this filter as a viewing device for looking at the sun or other bright light sources -- it is not rated for that use and can damage your eyes.