B+W Infrared Filter 093 52 mm. This filter blocks visible lights (up to 800 mm) almost completely. It is dark red, almost black. With analog IR film or IR sensitive digital cameras it delivers a fantastic wood effect (white leaves) and a typical dark sky. The exposure values vary according to the digital camera model being used and are best determined by experimenting. They are usually in range of a few seconds. Focusing is performed first without a filter using IR focus correction.
Tip
Whether or not digital cameras is IR-sensitive can be determined with an IR remote control. Instructions can be found on the Internet. The IR focus point is somewhat further away than that for visible light. With the filter attached, white balance is performed automatically or (preferably) manually. The IR photos are optimized in the image-processing program: Increase contrast automatically or in the histogram, convert color images to black and white or experiment with individual color channels, leaving the red channel on maximum. No matter whether digital or analog, infrared photography is experimental by nature.
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