A Foto-gears Mesen New Professional 52mm Neutral Density Filter Set (Nd2 Nd4 Nd10 Filter Set ) for Sigma,olympus,panasonic,tokina,tamron,leica Pentax, Fujufilm, Sigma, Canon, Nikon D3100, D3200, D5100, D5200, Ef-s 18-55mm F/3.5-5.6 Is STM , Ef 55-200mm F/4-5.6 Ii USM , Ef 50mm F/2.5 USM , Ef 40mm F/2.8 STM 52mm Nd Filter Set 1 Requires a slow shutter speed (long exposure required in the daytime or continuous dynamic screen shot). 2 Need shallow depth of field shot of (in the large aperture, by blurring the background to highlight the theme of the effect) 3 Need to control the speed (in very bright outdoor environments, maintaining the right amount of exposure) 4. The need to prevent over-exposure camera (the lens to avoid when using this camera is the smallest aperture change occurred in the case of exposure) 5. Model :52MM Foto-gears Nature Density ND2 ND4 ND10 filter set