Cavision 4 x 4″ Hot Mirror Filter

The Cavision 4 x 4 Hot Mirror Filter incorporates a dielectric mirror within the filter to combat infrared light pollution that becomes noticeable when making long exposures with a digital camera.

This situation is also naturally prevalent when photographing near strong sources of infrared, such as fires and at sunset.

The Cavision 4 x 4 Hot Mirror Filter effectively cuts out infrared wavelengths but does not interfere with visible red wavelengths.

This Cavision 4 x 4 Hot Mirror Filter measures 4 x 4″ / 101.6 x 101.6mm and is constructed from 30-layer coated optical glass.

The Cavision 4 x 4″ Hot Mirror Neutral Density 0.3 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.