Olympus M.Zuiko Digital ED 17mm f/1.2 PRO

Good Points: Sharp from edge to edge, beautiful colour, wonderful low light and natural light performer,excellent also with flash. I'm pro wedding photographer and my results with this lens are fabuous.

I have only bought this lens three weeks ago. My test is entirely "unscientific". Some pics I have taken of buildings at varying f-stops, the rest is simple every-day photography at different situations and light. Fully open the lens has an impressive performance. Tack-sharp throughout the entire image except for the very, very far corners. At f-stop 1.4 and 2.0 there is a very small increase of micro-contrast, and the corners look just about as good as the center. Further stopping down up to 8 only increases depth-of-field. To see the difference between 1.2 and 2.0 you need to look at 100% magnification. Working at low-light with this lens is a pleasure, sharp and blurry zones mould beautifully into each other. Simply incredible what Olympus has achieved, this lens is a gem . . . Why don't I give full marks for the overall performance? I would give it 10 out of 10, but the Zuiko 45mm/1.2 is even better . . . The camera I use is the E-M1.2.

Good Points: Superb image quality and excellent manual focus. Ease of use exceptional with lens change super fast on my Olympus OMD Improvement Points: Nothing at all, although this is not a cheap lens!

Does everything I wanted it to do. Wonderful in low light. No more stuttering to focus. Perfect for me

Lovely fast and sharp lens with great bokeh. Nice for street photography