The 45mm f/1.2 is a high-quality lens that is a good match for the OM-D E-M1 II and E-M5 II, having weatherproof and dust-proofing and a solid build. It also delivers superb images with sharp details and attractive out of focus areas (bokeh). Distortion, chromatic aberration and vignetting are all controlled extremely well.
Ilya Varivchenko tested the lens and writes:
For two weeks that I played with it, I never once use anything else on the camera simply because my needs were covered by 99%. I can generally sell all my gear and buy only one this piece of glass. And this lens is not a an expensive toy, but a tool – something that works always and is absolutely predictable
Photographybog conclusion is:
In terms of image quality, the Olympus M.Zuiko Digital ED 45mm f/1.2 PRO delivers outstanding results. It’s just a little soft when shooting wide-open at f/1.2, but from f1/4 onwards it’s pin-sharp both in the centre and at the edges of the frame. Bokeh is beautifully rendered thanks to the 9 circular aperture blades, whilst vignetting, distortion and chromatic aberrations are all very well controlled. Overall, there’s very little to complain about in terms of the image quality.
Subjective assessments of test shots showed them to be very sharp, even at the maximum f/1.2 aperture. The fast MSC autofocusing system and effective stabilisation in the E-MI Mark II enabled us to use the lens hand-held at very slow shutter speeds – as low as 1/10 second – and obtain a high percentage of sharp pictures.
J.S. Park: “I have completed a review of Olympus 45mm f1.2 PRO comparing it Panasonic 42.5mm f1.2. I’d like to share it with M4/3 users.
The lens manual can be found here: cs2.olympus-imaging.jp/jp/support/dlc/archive/man_mzded45f12pro.pdf