Nikon vs Tamron f/2.8 70-200mm

[nickzou]

Hey, just out of curiosity does the Tamron one have an aperture ring? I know the Nikon doesn't. Do any of the newere 70-200mm's have aperture rings?

 

[MReid]

You can save a little money by getting the 70-200 2.8 vr1 version, and still more by finding a used one.
The vr2 is a little better but how much better do you need than great.