I got one more piece of info. which maybe useful to you.

Before investing in an IR filter see if your camera is suitable (not all are) and the sensor is sensitive to IR light.

To do this: In a completely darkened room get your TV remote control and point it straight at the lens, set your camera to longest shutter setting and take a pic of the remote. While doing this press the volume control on the remote.

If the sensor is sensitive to IR light you will get a spot of light from the remotes IR led, if not you will have a black image.

Message edited on: 09/12/2005 17:18

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html