Check the listing for details. K&F Concept 49mm ND8 (3 Stop) Multi Coating Neutral Density Camera Lens Filter. Condition: New. Listed at 25.19 USD. About this item 3 Stop Exposure Correction | ND8 Filters reduce the amount of light entering the lens, allowing for slower shutter speeds like long exposure and motion blur. HD Optical Glass with Multilayer Coating keeps the color neutral and without color cast, let you obtain better image quality and more realistic colors. The ND filter also dustproof and waterproof. Aluminium frame | Slim profile to avoid vignetting on wide-angle lens ; Aluminium alloy frame sealing ring for better tightness, avoiding falling or releasing; Double-threaded for stacking. Function | ND filters allow you to have more control of the camera's aperture, exposure time and sensor sensitivity settings, which can produce a shallower depth of field, or achieve a sharper photo. It also helps improve video quality by introducing a natural motion blur for smoother motion in video in bright daylight situations. Choose the right size | Please verify your camera's lens thread size first(usually marked somewhere on the lens barrel or the lens cap). This number is always preceded by a "Ø" symbol. i.e. Ø49 = 49mm lens thread size. Product Description K&F Concept 3 Stop ND Lens Filter ND filters (Neutral Density) reduce the amount of light reaching the film without affecting the color (ND8 reduces the exposure by 3-stops). ND8 filters allow you to have more control of the camera's aperture, exposure time and sensor sensitivity settings, which can produce a shallower depth of field, or achieve a sharper photo. Improve video quality by introducing a natural motion blur for smoother motion in video in bright daylight situations. Double threaded metal frame for additional filters or Hood. HD Optical Glass Effectively block excess light, ensure the quality and sharpness of the pictures. Double-sided multilayer enhanced coating It greatly reduces the glare caused by the reflection of the external line of the long-exposure lens, and ensures the first-class image quality. Aviation-grade aluminum Frame thin frame design ensures that no vignetting will occur