Noob questions on IR

Maris said:

Yes, the overlap is critical! Here is an example using a relatively "mild" IR filter, a IR680 on Ilford SFX 200. The light loss is huge and I had an EI setting of 6 on my meter to help guess exposures.

Windblown Wreath
Gelatin-silver photograph on Fomabrom Variant 111 VC FB photographic paper, image area 16.4cm x 21.3cm, from an Ilford SFX negative exposed in a Mamiya RB 67 single lens reflex camera fitted with a 127mm lens and IR680 filter.

Click to expand...

And yet again Maris knocks it out of the park. Those highlight gradations are delicious.

I don't know if you've seen this thread, or not, HiHoSilver, but this is one I started where I give some examples of Rollei IR400S shot under full sun. In the 1st post in the thread, the two IR shots were at EI 25, then screw the filter on, the two visible light shots were at EI 400, no filter. For the photos in post #5 of the thread , I give the EI values for each picture in the post. These are just straight lab scans, no manipulation on my part.

For my next trick, I think I want to try some white pantyhose or something over the IR filter to see if I can get that IR glow that HIE was famous for. It's about time for me to order some more IR400S, I'm on my last roll as of now.

By the way, Maris, nice photo!