The Hoya 82mm Variable Density II Filter is a density adjustable filter with an ND range from 1.5 to 9 f-stops (ND3-400).
Variable density filters are widely used because they can replace a set of solid ND filters by providing a range density that can be adjusted according to the desired exposure settings.
In still shooting, variable density filters lower the shutter speed according to the photographer’s intentions when the shutter speed cannot be lowed due to camera limits.
Variable density filters can also increase the amount of bokeh when shooting in the over-lit conditions, thus, preventing the image from overexposure.
The difference with the previous HOYA Variable Density filter is the newly designed rotatable frame with convenient knob, allowing for better operation.