B+W Infrared Filter 695 60 mm Basic. The B+W 092 is a popular filter for IR photography with digital SLR cameras. This nearly opaque filter looks dark purplish when held in front of a light source and blocks the visible spectrum up to 650 nm. It passes only 50% of the radiation just below 700 nm and from 730 nm to 2000 nm, transmission is greater than 90%. Effectiveness and filter factor are largely film and light dependent and individual testing is recommended. B+W IR Filter | 695 (092) - 830 (