There is the case that you carry multiple standard ND filters and choose one of them, or stack them to get the desired ND value when shooting. This filter can reduce light intensity over a wide range from 1/2.5 to 1/500. Since the desired ND value can be adjusted by rotating the filter ring, there is no need to carry many ND filters with different densities. Despite of its double frame structure, it employs a
slim profile frame (thickness is 5.9mm without thread) to prevent vignetting.
|Light Intensity||1/2.5 to 1/500|
|ExposureValue||1 1/3 stops to 9.0 stops|
|Density||0.4 to 2.7|