05-05-2014, 08:16 AM
Your current 28-105mm has quite heavy barrel distortion too, does it not? Something unavoidable with standard zoom lens extremes...
The Sigma 17-50mm f2.8 probably is better than your current lens, with regard to barrel distortion:
http://www.opticallimits.com/canon-eos/5...os?start=1
The Sigma 17-50mm f2.8 probably is better than your current lens, with regard to barrel distortion:
http://www.opticallimits.com/canon-eos/5...os?start=1