-----------Infrared photography has given us the ability to record what the eye cannot see. As humans our eyes are sensitive to a limited band of wavelengths, between 400nanometres (the blue spectrum) and 700 nanometres (the red spectrum) known as visible light.
The infrared filter covering your lens is trying to block out all visible light and the internal hot mirror filter is effectively blocking out all near infrared light the amount of actual light hitting the cameras sensor is minimal. Consequently, shutter speeds times will be painfully slow. Even on a bright sunny day, working with a relatively sensitive camera, such as the Nikon D50, your shutter speeds are still going to be in the region 2 or 3 seconds at f8, with some cameras, considerably more! Obviously some kind of support is going to be needed whatever camera you use.
Some photographers might see this as a problem, others not. However, I have to mention it, this isn’t your only problem! Composition of your subject has to be made without the infrared filter in place, for the simple reason, the filter is opaque; you can't see though it.
Some photographers might see this as a problem, others not. However, I have to mention it, this isn’t your only problem! Composition of your subject has to be made without the infrared filter in place, for the simple reason, the filter is opaque; you can't see though it.
----------If you only ever use your camera for taking infrared images you may want to consider having the hot mirror filter completely removed and an infrared filter put in its place. The benefit of this procedure is easy to see; Normal shutter speeds, no messing around with filters, use any lens you wish, no tripod to carry around and no focusing issues to deal with.
Photo credits: Jayzer Abilar (Blacklist Photography)
Photo credits: Jayzer Abilar (Blacklist Photography)
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