Is the 24-105mm kit lens any use? Seems very good value
I just made the jump from the T3i to the 5D mk II. While I’m very happy I made the move, I must say that the mk II really shows the weaknesses in my 24-105L, especially with barrel distortion at 24mm.
Back to the OP though, the difference I’ve seen in moving to FF from a Rebel has amazed me. The two areas where the mk II stands out most for me are the vibrant colors and the performance at high ISO’s. I’m glad to be getting my feet wet in the FF world now rather than waiting for a camera that’s not even official yet. By the time the mk III is out, and in my price range, my experiences with FF on the mk II will allow me to make the most of the newer model.
Having said that, I do find that the T3i and the mk II are more complimentary than I would have thought. I plan to keep the T3i for a couple reasons. First, for some activities I like to shoot, like sporting events, I’ve become accustomed to the extra reach I get on my 70-200L’s. Second, the T3i is much more convenient for video. The T2i is not quite as user-friendly as the T3i with its articulating screen, but there’s still no menu diving required like with the mk II. And, of course, there’s something to be said about having a back-up camera.