jrlatham4567 wrote:
.When I visit the Gulf coast, I get the opportunity to photograph interesting birds in the air, sometime from a boat and sometimes from the shore. They move fast, auto focus is undependable. Sometimes they are 15 ft and sometimes 40 ft from the camera. Are there suggestions on how to get a good photo of a flying bird. ie: distance setting, f stop, ISO, etc (and lens) and strategy.
Jim
I shoot BIF all the time. I use a Canon 7d with either a 100-400 mm Zoom or a 500 mm prime.This is what I do:
I shoot manual exposure based on a test exposure of something aprox 17% gray. In direct sunlight I am usually shooting at 1/2000 sec, at f/8, ISO 800.
My AF system is set to AI-Servo AF with AF point expansion. That is single point AF with the 4 Adjacent points active if needed. The 7d allows you to adjust AI-Servo tracking sensitivity. I set it to Slow. This prevents AF from refocusing too quickly if you get off your subject briefly or something like a telphone pole passes between the camera and subject.
I stand with my left foot forward, slightly ahead of the birds track, camera tight to my face and the barrel of the lens held in my left hand. I see a bird I want to shoot, I begin tracking it with the camera, twisting at the waist and being careful to place the AF point on the bird. I follow the bird while I half press the shutter button to activate AF. When AF is achieved I roll my finger over the shutter button to activate shutter release. I don't just mash it down as this can introduce camera shake. I continue to track the bird shooting in continuous mode until the bird is moving away from me. I release the shutter but continue to follow through with the bird.
I do not use Image Stabilization as I find that it interferes with AF acquisition and AF lock. I rely on the 1/2000 shutter speed to handle both subject movement and camera shake.
Exposure is adjusted if I am shooting white birds either by raising the shutter speed or lowering the ISO or both. f/8 seems to be a sweet spot for my lenses so I tend to stay with it.
If you are having trouble finding the bird in the viewfinder and you are using a zoom lens then zoom out, find the bird then zoom back in and initiate AF etc.
I generally don't use a tripod for BIF as I find it hinders tracking the bird as you trip over the legs when you walk around it. The only exception is when I am working along a jetty and the birds are basically following the jetty and flying in a predictable pattern of straight and level flight.