JJC 49mm ND Filter ND2-2000 VND Variable Neutral Density Fader for Canon EOS R100 R50 R10 with RF-S 18-45mm Kit Lens,for Canon EOS M50 M6 Mark II M5 M200 with EF-M 15-45mm Kit Lens & Other 49mm Lenses

-- It enables slow shutter speeds to be used, especially with high speed ISO, to record movement in subjects such as waterfalls, clouds. -- It decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background -- It decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situation -- It allows cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure This JJC ND2-2000 Variable ND filter is designed with a built-in rotating ring that controls neutral density ranging from ND2 to ND2000 (1 to 11 f-stop). The heavier the density, the slower your shutter speed will be. It can reduce the amount of entering lights, but it does not change the original colors, which enables you to represent the photographic field. Another major benefit of this variable ND filter is the elimination of having to buy and carry around individual fixed ND filters. With this variable filter, you can rotate to the degree of ND you want, a real time and money saver. : When using this variable ND filter at high ND values (9 f-stop or above) on wide angle lenses, it would appear X cross mark, vignetting, or blur in the picture, this is unavoidable according to the structure and operating principle of a variable ND filter. If this is not acceptable to you, please go for a non variable ND filter, for example, a popular JJC brand fixed ND1000 10 f-stop ND filter. A fixed stop ND filter does not have the issue of X cross mark. ND2-2000 ND Filter ND2.5-1000 ND Filter ND1000 Filter UV Filter UV Filter CPL Filter Star Filter Kit