Originally posted by Chapel What is the practical distance to get nice pictures
I shoot small birds with 560mm glass and, you are not going to like this, but from my experience, in my area of the world, about 60 feet for reliable results.
Beyond that you start to just magnify air turbulence. Perhaps with the big raptors you could be further out but not by much - it's still going to go soft with all that air between you and the subject.
Sometimes you can luck out but don't count on it. This eagle was so far away you could not see it with the naked eye - I first saw it with 8x binos.
FF at 26x and 8mp crop. I have never shot at this distance before or after. - just dumb luck. About 1/3 a mile distance?