Questions about Hoya Pro ND200 Filter

The main difference between Hoya's ND200, ND32 and ND1000 filters lies in the amount of light they reduce and the practical implications of this reduction. ## ND200 - The ND200 filter reduces light by approximately 7 2/3 stops, equivalent to a factor of 200. This filter is useful for creating long exposure effects, motion blur and reduced depth of field even in bright light. ## ND32 - The ND32 filter reduces light by about 5 stops. This filter is less dense than the ND200 and is used to slow the shutter speed slightly, allowing you to create some motion blur and use wider apertures in moderate lighting conditions. ## ND1000 - The ND1000 filter reduces light by approximately 10 stops, equivalent to a factor of 1000. This filter is very dense and is used to create extreme long exposure effects such as dramatic motion blur and shallow depth of field even in very bright light conditions. ### Meaning of the numbers after 'ND' - The numbers after 'ND' indicate the density of the filter and, consequently, the amount of light the filter reduces. A higher number means more light reduction. For example: - ND2 reduces light by 1 stop (50%). - ND4 reduces light by 2 stops (75%). - ND32 reduces light by 5 stops. - ND200 reduces light by 7 2/3 stops. - ND1000 reduces light by 10 stops.