12-16-2011, 12:30 AM
I'm a Canon owner with a Tamron SP AF 17-50mm f2.8 XR Di-II LD. I'm not ready to go full frame for a few years. So I was thinking of upgrading to the Sigma 17-50mm F2.8 EX DC OS HSM. I have no problems with the Tamrom because I don't know any better. The reason for the possible upgrade would be for better sharper photos.
After re-reading both reviews the Sigma beats the Tamron with the MTF (resolution) from 17 to 50. I had a look at the sample images but I can't see full size images for the Tamron samples. I mostly shoot from 50 at 2.8 to f4.
Am I going to see a noticeable real-world difference with sharpness between these two lenses?
Thanks
After re-reading both reviews the Sigma beats the Tamron with the MTF (resolution) from 17 to 50. I had a look at the sample images but I can't see full size images for the Tamron samples. I mostly shoot from 50 at 2.8 to f4.
Am I going to see a noticeable real-world difference with sharpness between these two lenses?
Thanks