Be sure to see updated versions with reduced noise in post #7. Thank you for looking. I can only see the ISO equivalent on one of these at 1600. I'm pretty sure I bumped it to 3200 ("Hi" something on the d40, not listed as 3200) at least for the octopus because it was so dark and no flash allowed. They are hand held, and I tried to brace my arm. Specks are particles in the water. Keep in mind, I only have kit lens w/f3.5-5.6 max aperture. Yes, some are centered...not easy to compose with 50million people trying to get where you are. I haven't cropped or edited yet... 1. 2. 3. 4. 5. 6. He was suctioned against the wall....very very dark 7. 8. 9. 10.