The Cavision 4 x 5.65" Combination Hot Mirror/ND 1.2 Glass Filter combines both a solid ND filter and a hot mirror filter into a single solution for greater efficiency in controlling exposures and reducing the amount of IR light contamination.
The 1.2 ND filter darkens the entire image, allowing you to photograph with longer shutter speeds or wider apertures than normally required. By providing a 4-stop reduction in exposure, this filter allows you to control depth of field and convey movement more easily. The hot mirror portion of the filter incorporates a dielectric mirror in order to filter out infrared light pollution that is common when photographing with a digital camera in strong infrared situations, helping to achieve a more neutral color balance.
This filter measures 4 x 5.65" / 101.6 x 143.5mm and is constructed from 4mm-thick glass. Included with your filter is a microfiber lens cleaning cloth and a vinyl storage pouch with a touch-fastening flap.