One thing that really surprised me was the difficulty focusing the IR images. Firstly, the autofocus didn't work quite right - since IR light bends a different amount when passing through glass than visible light, the process the camera uses for visible light apparently doesn't work as well for IR light. The second problem was that when you block out all the visible light, the image gets much dimmer, so where the normal light images were taken at 1/200 of a second, the IR light ones were more like 1/2.5 sec, and at those lengths you start getting blurring from shaking the camera.
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timeasmymeasure
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Date: 2008-10-13 05:55 pm (UTC)