On Tuesday, January 21, 2003, at 12:31 AM, Thomas Bantel wrote:
There was an infrared version of a DCS camera based around the EOS 1N body, in fact. And many popular digital cameras, such as the Nikon Coolpix 900 series, are commonly used to take infrared photos as they're sensitive enough to IR to work.And about the infrared, why do you think there is no digi-equivalent? Well, maybe there isn't one now, but wouldn't it be possible to create one? I think, CCDs are quite sensitive to infrared, even more so than for the visible spectrum. Therefor, a digital infrared camera should be quite doable. [...]
The thing is that infrared energy tends to record as red light when detected by digital camera CCDs. So manufacturers build IR-blocking filters ("hot mirrors") into their digital camera bodies to avoid red fringing. These filters are usually, except in the case of some high-end cameras, fixed in place and are not removable. Since the percentage of people who want to take IR photos is pretty small I guess makers feel that they can sell more cameras by blocking this ability.
- NK Guy
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