Is your Digital Camera - IR Sensitive ?
A little search revealed that this has been a subject of research and there's a lot relating to this concept on the Web.
Just to give you an excerpt:
Unlike ordinary films, silicon-based CCDs and CMOS sensors turn out to be quite sensitive to the near infrared (NIR) in the 700-1200 nm (0.7-1.2µ) range — so much so, in fact, that some of the incoming NIR has to be filtered out in order to reduce IR contamination artifacts to acceptable levels in the visible light images most buyers aim to take. The usual solution is to fit digital camera sensors with special internal IR cut filters (IICFs). These sensor-mounted filters vary in their IR transmission spectra, but most consumer-grade digital cameras let enough NIR through to allow some IR photography. Despite a clear trend toward ever-lower IR sentivities in higher-end cameras, but it gets harder with every passing year.
To further your knowledge on Infrared Digital Photography:
http://dpfwiw.com/ir.htm
IR captured on the Digital Camera
(Pics 1, 2 & 3)


