The Tiffen Hot Mirror is a specialized optical filter designed to reflect infrared (IR) light back away from the sensor, preventing 'IR Pollution' which manifests as a magenta or reddish tint in dark areas of an image.
| Filter_Type | Hot Mirror (IR Cut) |
| Available_Sizes | 4x4", 4x5.65", 6.6x6.6", and various screw-in diameters (77mm, 82mm). |
| Cut-off_Wavelength | Approximately 680nm to 700nm. |
| Thickness | 4mm (Standard Cinema) or 2mm (Screw-in). |
| Material | Tiffen Water White Glass. |
It blocks infrared light from reaching the camera sensor. This prevents the magenta color shift often seen in black fabrics and shadows when using heavy ND filters.
No. A Hot Mirror specifically targets IR light without reducing visible light, whereas an IRND combines infrared blocking with neutral density light reduction.
The Tiffen Hot Mirror is available in standard cinema sizes like 4x4" and 4x5.65", making it compatible with most professional matte boxes from Bright Tangerine, Arri, and Tilta.
No, Tiffen uses Water White glass which is engineered to maintain extreme sharpness even at 4K, 6K, and 8K resolutions.