Fredrik Eriksson wrote:
> That is a matter of optics and filtering. Most cameras have an 
> IR-blocking filter mounted over the sensor.

Yes. But you have to also block the optical wavelengths, so it's not 
something you can install and have work. You actually have to change things 
inside the camera. (Or, on a SLR, I guess you could get a specifically IR 
lens or something.)

-- 
   Darren New, San Diego CA, USA (PST)
   Insanity is a small city on the western
   border of the State of Mind.

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