kemo wrote:
My Nikon D5100 is a pleasure to use but I still have difficulty getting proper focus of other (distant) ships at sea. Even with a tripod, the minor vibrations of the ship I'm aboard, coupled with oh-so-slight rolling, tends to make images blurry irrespective of camera and/or lens settings. In low light, of course, this is even worse. Any ideas as to what I'm doing wrong ? Thanks.
Very tough situation. Both ships are rolling, and yours is vibrating. I would suggest a high ISO and high shutter speed. The tripod might make it worse, since it is "attached" firmly to the vibrating deck, and it moves exactly the same as the ship moves. People tend to naturally counteract the movement of the ship. Taking lots of shots might help to get one good one.