I myself own a 1D mark III. A colleague bought a 7D, on this occasion they began to compare cameras by themselves. Was pleasantly surprised. In tracking autofocus, the 7D is not inferior to the 1Dmk3. Sometimes it seems to me that even surpasses. In terms of noise up to ISO 3200, 7D has a small loss, which is almost leveled by the larger image size. At ISO 6400, on the contrary, 7D noise is slightly lower. The viewfinders are the same. Switching to presets C1, C2, C3 in 7D is even more convenient than in 1D. Well, the screen is much better, there's nothing to say. In short, for reporting - a very practical acquisition.
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