The long awaited EF-S 17-55mm f2.8 USM lens

[goering]

i believe what is meant is that when moving to full frame you lose the crop factor. You lose the greater reach (for wildlife) and the greater working distance (for macro) in effective terms

 

[thw]

To me, for the price, it's not worth paying for the lens with IS, which to me is good to have but not must have. At that kinda price, the Sigma and probably the Tamron and Tokina f2.8, I guess, will cost about half the price albeit without the IS. I can live without the IS.

Sigma 18-50 f/2.8, Tamron 17-50 f/2.8 and Tokina 16-50 f/2.8 all do NOT offer USM (fast and silent focusing with full time manual) and IS, or their equivalence (HSM/AFS etc, OIS/VR/OR etc). For me, the whole reason for moving to Canon, having used Pentax for a while, is to capitalize on these technologies. I do not disagree about the exorbitant 2k pricing. But considering the usefulness of the 17-55 mm range on the APS-C format (28-88 mm), I am willing to fork out this money... if the lens quality is good enough.

Having said that, I am still waiting for the Tokina 50-135 mm f/2.8 (equivalent to 80-216 mm) to be released... unless Canon or Sigma releases something similar.

 

[thw]

i believe what is meant is that when moving to full frame you lose the crop factor. You lose the greater reach (for wildlife) and the greater working distance (for macro) in effective terms

Yup.