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Re: Sigma vs Nikon vs Tikina

Do you actually have one? Because mine has manual focus override and, unless I´m *very* mistaken, all mounts have it. I can see no point of making such a high-class lens with such a feature missing.
Regards,
Rodolpho Pajuaba

Brian Greenstone escreveu:
You don't want to use the Tokina 10-17mm for panoramas because it has no manual focus override. It's always in auto-focus and if the focus changes from shot to shot then your lens optimization parameters (a,b,c,d,e) will vary slightly which means you won't get very good stitches. You need a fisheye lens that has manual focus so that the focus does not change at all from shot to shot in order to ensure continuity in the lens parameters.

-Brian 
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