Autofocus System of Various Lens Brand

Started Apr 23, 2010 | Discussions thread
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jeetsupratim New Member • Posts: 2
Autofocus System of Various Lens Brand

Out of Nikkor, Tamron and Sigma.......
Which one has the fastest autofocus system........

I heard that getting pics of moing objects with tamron will be a bit problematic.
Is that true ??
I want to go for any one out of these three.......
1) Nikkor 18mm - 200mm
2) Sigma 18mm - 250mm
3) Tamron 18mm - 270mm
Can any one tell me, which one will be the best option ???

 jeetsupratim's gear list:jeetsupratim's gear list
Nikon D3100 Sigma 18-200mm F3.5-6.3 DC OS HSM Nikon AF-S Nikkor 50mm f/1.8G
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