Based on my wife's experiences, I think the 100-400 is a good investment and reasonably priced. She lost a bit of resolution with the first skylight filters we tried and is not using a filter now. We will not purchase any more until we are in a store where one can give them a try. With a little effort, she gets by with a lot of handheld shots but it is an image stabilized lens. One really crosses a fiscal line when he steps to 500. Search around here a bit, and one can find several pics my wife has taken. They are of course scaled down for posting, but one should get an idea of its potential.
Last edited by 1minute; 12/01/10.
