Mayday- So you have a dSLR? Could be lens kit like you said? Is that the basic kit that comes with it? Cloudy days are bad for IR. All the IR is diffuse from the clouds, pushes shutter times to the moon, and if its windy your foliage will be blursville. Also means that burn-spot will appear with a vengence. Focus will be hard in manual and impossible for auto. Could get noisey too.
I suggest what i did for 2 years...frame your shots carefully, keep that burn-spot on trees or clouds or grass so it will blend in. Keep it off the sky, rocks(most), dirt, bark, water, man-made objects(some)...all of which absorb or scatter IR light.
For my store bought IR filters, i have a Hoya R72 for my new camera and a B+W #093 from my old camera. Neither gets used much. I put the 093 on a flashlight sometimes so i can paint in IR at night, or need to focus in IR at night.

Tvernuccio- 50-100ISO, My old camera could capture at 1/30-60 shutter. New camera not as sensitive, so 1/4 on down for it. Full open aperture. These apply also to my homemade false-color filters.

And to both of you- Take lots and lots and lots of shots of whatever subject your shooting. Because only a few shots out of a hundred may make the final cut...too many things out there that want to ruin your shot(see dust image as example).
Check your manual focus when your using it. Ir has closer focal point than its visible cousin. If you try to focus in visible light, then lock it and put your Ir pass filter on, itll be out of focus and youll have to adjust.:(

Hope this info helps. :)

Mike

Message edited on: 09/08/2005 20:56