Hello all, I have a few questions about IR photography. I have never done it,it, but I've seen some very nice photos done using it and it has piqued my curiosity. When using a DSLR, do you need to buy a special lens, or is it as simple as buying an IR filter? Does the amount of available light matter, that is to say, would it be better to shoot on a bright sunny day, or on a cloudy overcast day OR can it even be done at night? Do the shutter times need to be increased, decreased or do you just shoot normally?