If you need an extremely high quality product, this is the one for you...I can't imagine that the canon version would be any better...Images are clear and sharp, just as sharp as the lens without the converter...I got this from 17th street photo at less than 170.00...a great price and delivery was ground, (in two days.) Their service is great...I use the converter on the canon 50mm 1.8 and 70/200 f4 L IS....amazing clarity and magnification...I'm extremely pleased with this purchase.