SQUIRL033 wrote:
i've read the DxO report as well, and actually, it marks this new Tamron lens as equal to or slightly better than the Canon 100-400L on that body. a touch more CA and distortion, but then, the Canon only goes to 400mm, so those results aren't surprising. comparing it to the results on a full-frame body like the 5D mk III just isn't a fair comparison; the Mk III is a much newer design, with better AF and better processors.
frankly, the only concern i have at all with this lens - aside from not having the scratch to buy one! :( - is the issue with the AI servo focus tracking at longer focal lengths. it's not an issue shooting static subjects, but for BIF shots, which i like to do, it could be problematic. the lens performs fine with the 70D and 5D3 and 1Dx, but the "older" bodies, like the 7D, 1D4, etc., seem to exhibit problems. i'm hoping by the time i can scrape together the wherewithal to buy one Tamron will have fixed the issue so i can order one without reservation...
i've read the DxO report as well, and actually, it... (
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Seams you said that in an earlier post. If you read my earlier post, before your first one, you will see what I think of the Dx0 reports.
It is addressing this problem directly.