I thought that this was worth pulling out of the HD keychain cam thread:http://arch.ced.berkeley.edu/kap/discuss/index.php?p=/discussion/3594/hd-keychain-cam
especially as it is easy to confuse the different keychain models.
A HD 808#16D video still with the camera's rear hot mirror replaced with a £7, 6mm diameter 830nm IR pass filter (LPF-830-0601) as identified by David Sykes:http://www.stockoptics.com/filters/long-pass-filters/circular-long-pass-filter.html
You screw out the lens, prize out the hot mirror and then push in the 6mm IR filter and then screw back the lens. Focusing obviously varies as you screw the lens in and out. Keep everything clean!!!
I will add a small focusing scale to the lens, to sharpen up the focus.
I did this with the camera taken apart but it should be possible to do it without dismantling the body of the camera (I will have a go soon).
I have worked with a range of near IR cameras but, despite its limited resolution, I find this camera most pleasing and, weighing only 18g, of amazing potential!!!
Added 16 Feb:
Without the sun and better focused (look at the windows in the distant houses).
Near IR KAP is now a technique that can be used with kids without worrying about cost. http://www.armadale.org.uk/aerialtechniquesforchildren.htm
The converted camera is ideal as a stick-on auxiliary camera.
You will need a class 4 (or above), micro SDHC card.
Manual and software for interval mode, exposure etc:http://www.armadale.org.uk/808manual.pdfhttp://www.mytempfiles.info/nr16/index.html