upgrading a 30D to a 7D. Anyone using the tamron 17-50 + 7D?

Started Nov 28, 2010 | Discussions thread
mangofrefav New Member • Posts: 24
Re: upgrading a 30D to a 7D. Anyone using the tamron 17-50 + 7D?

you may want to check this linkon Tamron 17-50 and 7D compatibility:
http://www.dslr-forum.de/showpost.php?p=7463669&postcount=407
Or alternatively on
http://www.canonrumors.com/category/photography/third-party-lenses/

Where they report the following (it is for the 17-50 VC but non-VC maybe affected too?):
Quote

We observed a phenomenon where the followings lenses won’t use the outer cross-type sensors of EOS 40/50/60/7D cameras right.

The lenses that show this problem are (all Tamron):

  • 17-50 f/2.8 VC

  • 60 f/2 Macro

  • 70-200 f/2.8

  • 10-24 f/3.5-4.5

To get a bit more into the detail of the problem – on the 40/50/60D cameras the outer cross-type sensors only work as line-type sensors. To be a bit more correct, they actually work in the same direction as they would work on cams like the 30D or like the 400/450/500/550D. When it comes to the 7D the outer sensors are also only working as line-type sensors (but it seems, that the EF 50 1.2L also has problems to use them correct).
Unquote

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