with that camera you can select which of the squares you see in your view finder is the point it uses for auto focus. there are some many things in an aquarium setting that if leave them all active, it will focus on just about anything......except your clown
also try a tripod. i have been shooting from farther away with a longer focal length lens and using a tripod. the fish dont alter thier behavior as much because they cant see you as well
75g RR. 2x250 14k MH
/ 2x54 T5 act. 29g sump. ASM G1X skimmer. phosban reactor. 80lbs LS
, 90lbs LR
, 2x seio M620.
kole tang, bicolor angel, mandarin dragonette, ocellaris clown / BTA , cleaner shrimp, 2x peppermint shrimp, a variety of soft, SPS
, and LPS
corals, orange linckia star.