It's a nice lens, but does have some shortcomings wide-open (purple fringing).
Of course this is widely reported, but I've not really had issues such as this. And certainly it's nothing PSP or Lightroom can't sort out with a click of the mouse![]()
I had the 17-55 2.8. I'm returning it to get the 28mm 1.8 USM and the 85mm 1.8 USM (already have the 50mm 1.8) I will use the 18mm on the 18-55IS kit lens if I need something wider. My few days of flat out using the 17-55. I just couldn't justify the money (and I think primes are superior)