Thought I would start a thread on caves. Last weekend, I organised a private photographic tour of Jenolan Caves, about 100 miles west of Sydney. These shots were taken with my Olympus E-P1 and Panasonic 20mm f/1.7. I used autofocus (no trouble focussing in the low light). The advantage of the private photo tour was that we could use tripods. Other shots from the public tours were hand-held as tripods were not permitted. No flash shots here. #1 Tripod (I think), 1/8s at ISO2000 Jenolan Caves OP 4 by peterb666, on Flickr #2 Tripod, 1/4s at ISO800 Jenolan Caves OP10 by peterb666, on Flickr #3 Tripod, 1/4s at ISO800 Jenolan Caves OP11 by peterb666, on Flickr #4 Hand-held, 1/30s at ISO1600 Jenolan Caves OP12 by peterb666, on Flickr #5 Hand-held, 1/20s at ISO1600 Jenolan Caves OP13 by peterb666, on Flickr #6 Hand-held, 1/30s at ISO1600 Jenolan Caves OP14 by peterb666, on Flickr #7 Hand-held, 1/15s at ISO1600 Jenolan Caves OP15 by peterb666, on Flickr I am very impressed with these shots. In retrospect, I have no idea why I shot at such a high ISO when using a tripod (actually I do know, I forgot to check the ISO) but even so, I only lowered it to ISO800. If you have some cave shots, please add them.