Top positive review
An absolute steal. Should be in everyone's camera bag!
19 September 2015
This is a cracking little lens.
I did a comparison between this and my Canon 24-105 f/4 IS L @ 85mm and the differences are shocking. This lens is so much sharper and has much nicer bokeh. At f/1.8 it's a teeny bit soft in the middle (which may actually be quite flattering for portraiture) and there's quite a bit of vignetting, but stop down to f/2 - f/2.2 and it's lovely. By f/2.8 it's beautiful.
There's so much more detail in the edge of the frame compared to the 24-105 - not that it'll make much difference if you're shooting portraits as the edge and corners would most likely be blurred anyway, but, in the instance where you have the subject in the edge of the frame it'll be pin-sharp at f/2.8 with hardly any vignette. In comparison, the 24-105 at f/4 has so much vignette that it's really noticeable compared to the little 85mm Canon and the edges are mush.
I'd have absolutely no worries with using this at f/1.8 - especially considering vignette can pretty much be eliminated in Lightroom / ACR - but for me it's at its best at f/2.8. This is where it really shines if you ask me.
I bought this during Canon's £35 rebate scheme so I ended up only paying £200 for this lens. £200! That's a true bargain for something that does something so well. Great colour and contrast across the frame. Perfect for portraits.