Originally posted by joefru But the CameraBright is not infrared. It says it uses white LEDs, which would certainly be visible. It also claims to "reduce redeye, helps compose pictures," etc., which would mean it has to use visible light.
Actually, Halil has confused the issue somewhat by intermixing my infrared suggestion with another person's mention of the CameraBright. The CameraBright is obviously not infrared and I've made no suggested otherwise. My comments have focused solely on the infrared modification to the device I described earlier in this thread. By the way, a laser (such as those being discussed now) is also not infrared, so my comments don't apply to lasers as well. Most camera manufacturers use infrared for focusing assist devices exactly because infrared is mostly outside the visible light spectrum. What little remains in the visible light specturm is eliminated by IR filters over the image sensor.
Actually, it's very simple to convert virtually any light (a flashlight or whatever) into infrared by simply placing an infrared pass filter over the light source. These gel filters are routinely sold by school suppliers, such as
Edmund Scientific, to use with optics experiments.
stewart
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