Over four years after the 5D Mark II’s release, its successor looks like a nice, if not a bit moderate1 upgrade. The most compelling upgrades will probably be the much better autofocus system, the potentially better low-light image quality, and the headphone jack and new controls for shooting video (if you’re into that).
We won’t know how much the image quality has improved until the professional reviews are out, but I bet this will be a lot like the iPad 2’s improvements over the iPad 1: many small and medium improvements that result in an overall large improvement.
If my 5D Mark II broke tomorrow and I wanted to replace it, I’d definitely get the Mark III. But I don’t think most Mark II owners, including myself, will be compelled to upgrade yet.
My favorite comment on that post:
“I’m sure it is great, BUT, after Cannon would not send me a manual for the last Cannon I bought even after I called three times, I told them that if I did not receive it that this would be the last Cannon I purchased. Well, I didn’t get it! NO MORE CANNONS FOR ME.” ↩︎