Canon Community

Thanks Tim,  I have 2 friends who use the 50-500mm Sigma, one is the old lens, the other one new and they get very good results on birds in flight.  Also, I find the push-pull of Canon to be harder to use. If anyone out there has an opinion or knowle...

Tim, I do all of what you suggest.  I use the Canon 100-400mmL lens and am considering the Sigma 50-500mm OS lens.  Does anyone have any knowledge about this lens.  SinceIi can't afford the Canon 500mm, thought this might be a good alternate.

Thanks for the info, I have a 7D and was using the center focus point only, will try multi points and I do use back button focus.

Thanks for the info, that is what I have been doing.  People at Canon suggest using multipoints for focusing.  As you said, practice,practice,practice.