Newbie question about third party lenses...

Started Aug 25, 2012 | Discussions thread
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omne Forum Member • Posts: 87
Newbie question about third party lenses...

As title says it's a newbie question...

I understand that different products and brands have different technologies, some lenses may not be compatible with some cameras or some lenses might have limited features on different cameras or vice versa.

I'm going to get one of these lenses for a Canon 7D as my first lens:

Tamron SP 17-50MM F/2.8 Di II XR VC LD Aspherical (IF)
Sigma 17-70mm F2.8-4 DC Macro OS HSM
Sigma 17-50mm F2.8 EX DC OS HSM

I should get either one of the above lenses or the EF-S 15-85mm f/3.5-5.6 USM IS .

I would like to know, if I choose any of the mentioned third party lenses, will my camera's ability gets limited? are these lenses compatible with all features of Canon 7D?

PS. I appreciate if you also let me know what you think about these lenses, thank you!

Canon EOS 7D
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