Digital Silver Imaging, a company that specializes in black and white photography, is now offering several infrared conversion specials that will last through May. Working with its partner, Precision Camera, Digital Silver Imaging will convert most digital cameras, whether point-and-shoots, DSLRs or full frame DSLRs, to infrared cameras. The conversion involves adding a special filter to the camera's sensor to limit recorded light to certain wavelengths. It also includes custom white balance and calibration.
In infrared photography, the film or image sensor used is sensitive to infrared light. Infrared light is found at longer wavelengths than visible light, which extends to 700 nanometers (nm), the red end of the spectrum. Infrared photography covers the range from 700nm through about 1,000nm. Longer wavelengths are in the range of thermal photography. Infrared photography can produce weird, dreamlike images resulting from the different amounts of infrared light that objects reflect.
Digital Silver Imaging offers three conversion options. The 665nm is a specialized infrared conversion. It blocks wavelengths shorter than 665nm and allows those longer than 665nm through. It is especially well suited for color infrared photography. The 715nm is your typical infrared conversion. It is a true infrared filter that should primarily be used for black and white photos. The 830nm conversion is a deep infrared filter which allows for a very dramatic black and white infrared look. It is not suitable for color work.
For further information, see the infrared page at Digital Silver Imaging.