This B&W 40.5mm 093 (87C) Infrared Glass Filter blocks the entire visible spectrum, so to our eyes it looks completely opaque. Unlike the B&W 092 infrared filter, it makes pure infrared photographs possible without the visible red component.
| Type | Infrared |
| Size | 40.5mm |
| Grade | 093 = 87C |
| Filter Factor | Very dependent on the illumination and on the characteristics of the film |
| Multi-Coated | Not Applicable |
| Rotating | Not Applicable |
| Effect | Removes complete visible spectrum |
| Application | Forensic and scientific photography |
| Color Temperature | Not Specified by Manufacturer |
| Construction | Schott Glass |
| Front Filter Thread Size | 40.5mm |
| Front Lens Cap Size | Not applicable |