I'm planning to get some shots of ducks in flight and would like some advice. Such shots pose all kinds of challenges with focus, exposure, lighting, shutter speed and background.
Most problematic is they must be taken against a background of the sky, which is much brighter than the subject. My idea is to shoot very early or late in the day and try to capture sunlight reflecting off the bottom of the birds.
To stop the wings, I figure I need to set my camera to shutter-preferred, and I think I need at least 500th of a second for a really sharp shot, but this presents a lot of problems with DOF and focus. I'm going to be shooting them with a 200mm f/2.8, which is pretty fast, but it also means I have to get pretty close. My idea is to set up where they are coming in to land, wings cupped, to cut down on movement and maybe make 250th adaquate to give me a better f-stop and wider DOF.
Focus on something that close and moving that fast is a real challenge, so, instead of trying to focus to fit the rapidly changing distance of the bird, I figured I would leave the focus set at a certain distance and try to time the shot for when the bird first flies into range. I'm also thinking I might set my camera on auto-bracket, so I can fire off three shots rapidly and then deal with the exposure paramaters in the computer.
What do you think of this plan, and do you have additional suggestions?