Quote Originally Posted by Joel Eade View Post
If they (Canon) would see fit to allow f/8 AF then it would be a no brainer for birds .... the 800mm +/- the converters
You know we should think that, because all the other supertele's with the 1.4 converters are fairly usable. My impression of the charts is that the 800mm with the 1.4x is kind of weak. Naked lens though it would be great way to go.

http://www.the-digital-picture.com/R...mp=0&APIComp=0