I don't think IQ would be a primary differentiating factor between the 100-400 and 150-600 Contemporary lenses. They're both good, but final use will likely be the determining factor for most when choosing between Canon's compact and consumer oriented 70-300 II and Sigma's longer Contemporary zooms.
[and somehow, Canon's lens at US$499fits nicely into the pricing progression of these lenses!]
May 18, 2017 at 09:37 AM
Previous versions of johnctharp's message #14041570 « Sigma 100-400 »
