For extreme contrasts
Digital cameras are normally equipped with a permanent IR-cut filter in front of the image sensor, but the residual IR that is still transmitted can be used for typical infrared photos. The B+W 092 infrared filter 695 and the B+W 093 infrared filter 830 utilize exactly this gap when visible light is blocked.
The image is pre-selected and IR focusing is performed before attaching the filter as checking through the viewfinder or on the LCD is not possible when the IR filter is attached. The result is creative infrared photos with an amazing "Wood effect" (white leaves) and the typical dark sky.
The IR photos are optimized in the image-processing program: increase the contrast automatically or in the histogram; convert a color image to black and white or "play" with individual color channels, leaving the red channel at maximum. Infrared photography always has an experimental nature to it.