On our recent trip, we visited Carlsbad Caverns in New Mexico. The cave is huge and very dimly lit, so photographs were a problem. I did not take my tripod, as I thought they might not allow them (they do allow them) so I ended up trying to steady my camera on the round railings. I found that exposures of 1.6 seconds provided the best shots I could get. I generally still had to sharpen the images a lot. They do, however, provide a pretty good idea of the amazing formations everywhere you look. Actually, I could not see many of these structures in the dimly lit cave, but when I looked at my photos, I saw a lot of detail that I had not seen myself. Hope everyone has a really good day today. We are having the last of the winter storm that hit yesterday....cold and very windy. You need to look at this in the largest sizes to see the detail in the image.