093 infrared filter black red 830. The B+W 093 infrared filter 830 blocks all visible light, it therefore appears black and, unlike the B+W 092 infrared filter, allows 695 shots in pure infrared without the visible red. Transmission only exceeds 1% at 800nm to increase to 88% at 900nm. With this pure IR filter, pay great attention to the IR residual sensitization of the digital camera. The filter factor depends very much on the lighting. The optimal exposure value can be determined via a test series. - For experimental photographs - Image results with extremely high black and white contrasts - Green foliage is reproduced bright white - Made in Germany Digital cameras usually have a built-in IR-cut filter in front of their image sensor, but the existing residual sensitization can be used for infrared recordings. This is exactly the gap that the B+W 092 infrared filter 695 and B+W 093 infrared filter 630 take advantage of when the visible light is blocked. The selection of the image section and the infrared-related focusing are done before screwing on the filter, as control in the viewfinder or on the LCD is not possible with the infrared filter attached. The result is creative infrared photos with a fantastic "wood effect" (white foliage) and the typical dark sky. In the image program, IR photos are optimised: contrast automatically or increased in histogram. Convert a colour image to SW or "play" with individual colour channels, the red channel remains at maximum. Infrared photography always has an experimental character.