
Would probably help if you told us the lenses in question...
"None of the above"
Nikon Lenses for Nikon Cameras! :rules:![]()
Or the Tamron if you don't have a grand to spare for a 17-55![]()

Mike, i'm hanging on for decent reviews of the new Sigma 17-70
not avaliable in the Uk yet though and would probably take a while for reviews to fiter through.
see: http://www.talkphotography.co.uk/forums/showthread.php?t=185076
Hi Al, i think the constant f2.8 makes the tamron 17-50 the winner for me, loving the bokeh effect on the example pics ive seen and the sharpness seems outstanding. Nice to have a lens that can deal with low light, i have my 50mm f1.8 but i feel i need something to have as a walk about lens that covers a nice usuable range and is capable. The 17-70 is variable so only f2.8 at the wide end which makes it less appealing to me.
My decision will be made today i think![]()
remember the Image stabilising will be good for a couple of stops i would imagine :shrug:
I'd try a pair of Tamron's - the VC and non-VC variants. Forget the Sigma.
The other alternative is a used Nikkor 17-55, which can be had for around £650 in decent condition.

Thanks all for helping in the last few hours, i have finally made my decision and the Tamron 17-50 F2.8 has just been ordered before the 12pm cut off for next day delivery.
This has been one of the hardest decisions ive had to make in a long time but i finally got there.
For me the example photos i have found for the tamron are outstandingly sharp, i have to admit i have seen some crackers from the sigma but in general every photo by the tamron is way ahead![]()
"None of the above"
Nikon Lenses for Nikon Cameras! :rules:![]()