Hm, in such case, need to check it again. I must admit - I based assumption about hardware'ish filtering on discussion from fCam API forum (can't find link now), where someone gave up due to inability of enabling IR full-pass. That's why I focused on building multi-IR-diode setup powered from N900 battery, and later, from USB port.

The known "joy trick" is watching IR diodes light from remote controllers on N900 viewfinder - so, our filtering isn't very restrictive, yet, too high to allow true short range nightvision. Does anyone have idea, which part exactly can be IR filtering? Could it be plastic part that we see from outside, or something between lenses and sensor, like strange1712 suggested?

AFAIK (again, based on talk with some photo guy, not my own research) removing IR filtering would case problems with focus, when taking regular photos. So, *if* filter is really accessible, we would need to setup some "switching" mod.

Quite complicated, but it is nothing compared to joy of having short-range high resolution Night Vision option in our lovely device, almost for free (bunch of cheap IR diodes, and some modding work).

/Estel