Sony
Sony Alpha a6400 compact mirrorless camera black with 16-50mm and 55-210mm lenses 32GB
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B + W Filter Company
B + W Filter Company 37mm Infrared Filter #092 (89B/RG695) camera filter
Dark red 37 mm filter blocks light below 650 nm for black-and-white infrared film with a 20–40× factor
- Blocks light under 650 nm for pure infrared capture
- Filter factor 20 to 40 suits black-and-white infrared film
- 37 mm thread fits compatible lenses directly
- Dark red #092 glass transmits deep red and near-infrared
- Designed for 89B/RG695 spectral requirements
37mm Infrared Filter #092
This dark red filter blocks wavelengths below 650 nm for black-and-white infrared film photography. It mounts on lenses with a 37 mm thread and carries a filter factor of approximately 20 to 40. The glass is designed for use with films sensitive up to 1000 nm.
Upgrade from standard red filters
Standard red filters transmit more visible light, which reduces infrared contrast on film. The #092 becomes worth it when you need deeper infrared separation and can accept the exposure increase that the high filter factor demands. It is not for colour infrared work where an orange #099 filter balances spectral sensitivity.
Thread installation and exposure
The filter screws directly onto a 37 mm front thread with no adapter required. Vignetting can occur on wide-angle lenses if the filter frame is thick, so check clearance before shooting. Remember to compensate exposure by roughly four to five stops because of the dense filtration.
Highlights
- Blocks light under 650 nm for pure infrared capture
- Filter factor 20 to 40 suits black-and-white infrared film
- 37 mm thread fits compatible lenses directly
- Dark red #092 glass transmits deep red and near-infrared
- Designed for 89B/RG695 spectral requirements
Specifications
No published specifications for this item yet.
Questions about this item
What thread size does the 37mm infrared filter #092 need on the lens?
It requires a 37mm front thread on the lens to screw on directly.
How do you install the #092 filter and what step is often missed?
Screw the filter onto the 37mm thread, then adjust exposure for the 20 to 40× filter factor.
When should the #092 filter be replaced or cleaned?
Clean the glass when dust or smudges appear; replace it if the coating is scratched or the filter ring is bent.
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