Olympus mZD 17mm f/1.2 Pro lens

Introduction

17mm focal length f/1.2 aperture (equates to 34mm f/2.4 in full frame field of view and depth of field (DOF))
weathersealed - dustproof, splashproof, and freezeproof (down to 14°F/-10°C)
manual focus clutch
customisable lens function button
Z Coating Nano technology
internal focus, stepper AF motor
MSC (Movie- and Still-Compatible) autofocus mechanism that provides virtually silent and smooth high-speed focusing performance
62mm filter
close focus 0.2m (7.9“) giving 0.15x macro (0.3x in full frame terms)
designed for feathered bokeh with the design approach which gives attractive bokeh without any of the light loss causes by the use of apodization filters in Fujifilm's APD or Sony's STF lenses
15 elements in 11 groups including 1 Super ED, 3 ED, 1 ED-DSA, 1 EDA, 1 Super HR, 1 aspherical - a unique ED-DSA element, which has dual aspherical lenses formed from soft and hard-to-work extra low dispersion glass. They claim to be the only company currently able to do this.
LH-66C lens hood included
68 mm (2.68″) x 87 mm (3.43″) long
390 g (0.86 lb)
$US1200, available Jan 2018

see Olympus mZD 17mm f/1.8 lens
slightly more closely focusing
1 stop wider aperture and shallower DOF
seems to have nicer bokeh balls and the out of focus areas near the focus point seem more blurred at same aperture (presumably this is what Olympus means with more “feathered bokeh” - distant bokeh is similar at same apertures
mildly sharper across the frame
weathersealed
larger, heavier, much more expensive
Mirrorless Comparison - 17mm f/1.2 vs mZD 17mm f/1.8

https://blog.mingthein.com/2018/01/01/review-the-olympus-m-zuiko-17-1-2-pro/
Youtube review by Gordon Laing
https://www.imaging-resource.com/lenses/olympus/17mm-f1.2-pro-m.zuiko-digital-ed/review/
- exceptionally sharp at both the center and in the corners at f/1.2
- only a minimal dip in sharpness starting around f/11 and continuing until f/16
- 0.5EV vignetting and minimal CA wide open
- almost no significant geometric distortion