This Tiffen 4x4" Infrared Filter #87 is for black and white infrared film when you only want to transmit the infrared spectrum and none of the visible spectrum. Prior testing is recommended.
Specifications:
- Type: Infrared
- Size: 4x4" (100 x 100 x 4 mm)
- Grade: 87
- Filter Factor: Determined by the film sensitivity
- Effect: No visible transmission
- Application: For black and white infrared film only
- Construction: ColorCore glass