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[quote name='JOLYON' timestamp='1285642015' post='3305']

I have take Nikon D90, and i would like to buy a telephoto lens with fix aperture, such as 70-200mm or 80-200mm f2.8 .

I have not more money to purchase nikon 70-200mm f2.8 VR， so i want choose one at nikon80-200mmf2.8 or Sigmal 70-200mm f2.8. but i don't know they reality performance.

who can help me guide this？ thanks

Ps: and hear of Tamron 70-200mm f2.8 lens, how is it?

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The Nikon has good optics. The Sigma is also good, maybe a tad less in certain areas, but it offers image stabilization, a big plus. And silent and fast AF (the Nikon uses the in body AF motor).



The Tamron has very good optics, but slow and noisy AF, and no IS. And its build quality lags a bit.



The Sigma has big focus breathing (like the Nikon 70-200mm f2.8 VR II), making it not even near 200mm at close focus ranges.



I would rate them as follows:



Image quality (optics):

1. Tamron
   
   
2. Nikon
   
   
3. Sigma
   
   

All are good, though, it is closer than you might think.



Features:

1. Sigma **
   
   
2. Nikon, Tamron
   
   

** by far the best, with its HSM and OS



Close up photography:

1. Tamron
   
   
2. Nikon
   
   
3. Sigma**
   
   

** by quite some margin the worst



Build quality:

1. Nikon
   
   
2. Sigma
   
   
3. Tamron
   
   

Try to determine which of these criteria are the most important to you.



For me, close focussing ability is very important, so the Sigma would not be my choice.

If I already had a 200mm lens that allows closer by focussing, I would pick the Sigma because of its OS and HSM.

But for me, in this group of 3, I would then have to pick the Tamron.