Wednesday, August 30, 2006

Is your camera ready for Infrared?

The main accessories for digital infrared photography are a TRIPOD, and an INFRARED FILTER, that will block visible light but let the invisible infrared light pass through to the camera’s sensor.

The tripod is almost always a requirement to stabilize your camera, because the filter is so dense that your exposure will be very long – and camera shake will knock your images out of focus. When you look through an infrared filter, it is just about black, and you can barely see anything except the brightest objects (like the sun!) through it.

But most of all you need to know if your camera is ready for infrared.
There's a crude test that's often recommended to determine if your camera is IR capable. Point a remote control at your camera lens and see if you can see the light in the LCD. If the beam records brightly, then the hot mirror filter on your camera isn't blocking out all the IR and is capable of generating some sort of image. A good result should look bright without a lot of purple. If the light only appears dim or doesn't appear at all, then your camera probably isn't suitable for IR.

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