
Originally Posted by
Johnny Bravo
I think the differentiation is all tied up in the phrase "virtually the same image quality''. I've run extenders on all the super tele's, and while they may be virtually the same to some, they show up on my monitor as ''not the same'', in real life. My 600 loves my 1.4, but it's still not as good an image as the native 600. It's good, very good, but it's not AS good. Any extender is an optical compromise as there are some physical laws that optics designers just can't get around. (Hence--truly great lenses cost a bundle)
Weight? Not yet announced but I'd be very surprised if it's much diff than the 600--cutting down the size of the objective lens cuts a LOT of weight ('pie R squared is a powerhouse of a formula). We'lll see.
As far as Canon's marketing....well....I just waited 4 months for my pre-ordered 1DS to arrive. After waiting 3 earlier this year for my Mark III. They've got a pretty good track record. Heck, I'll place my order for an 800 the first day I find out I can. I'm thinking their marketing guys are feeling pretty secure in their jobs right now!!