Tomek Kulas from M43.eu has given kind permission to present and analyze some of their pre-production Olympus 17mm f/1.8 sample images here at Mu-43.com. In case you haven't checked them out, M43.eu has published a very nice user report (link, translation) as well as sample images including RAW files for download (link, translation). Those interested in this lens should have a look at the samples, but here were my takeaway points: 1) Sharpness is closer to the level of the Olympus 17mm f/2.8 than it is to the level of the Panasonic 20mm f/1.7. I consider the former to be an underrated lens with very decent sharpness overall. However the Panasonic is a lens I don't hesitate to shoot wide open with the expectation of biting sharpness in most of the frame. The new Olympus seems to fall a bit short of this standard. Here is an f/1.8 file provided by M43.eu which I processed from RAW, showing 100% center and edge crops: 2) As is true for most lenses, sharpness is very decent when you stop down. Here's an f/3.5 file from M43.eu, again processed from RAW with multiple 100% crops displayed: 3) The new Olympus lens, like other wides for Micro 4/3 such as the Panasonic 20/1.7 and the Olympus 17/2.8, has marked barrel distortion. The PTLens profile for the Olympus 17/2.8 is perfect for the new f/1.8 lens, demonstrating that they are the same in terms of distortion. 4) Bokeh is soft and pleasing with this lens. I feel the same way about the 17mm f/2.8 lens, although obviously the faster lens will give more opportunities for shallow depth of field and out-of-focus blur. 5) Axial (longitudinal) chromatic aberration (CA), ie purple/green color fringing on out of focus elements of the image, seems well controlled with this lens. This image from M43.eu shows both the pleasing bokeh rendition and a small amount of axial CA demonstrated by the new 17/1.8: Crop from the above image to better show axial CA: 6) Lateral CA (red/cyan color fringing) is moderate with this lens and requires correction even when the is lens stopped down. Slightly disappointing in this regard. My overall impressions based on these samples is a positive one. Resolution is adequate, character pleasing, and what aberrations are present should overall be easy to correct with acceptable effects on overall image quality. The net package should be a good addition to our system, particularly for those of us who predominantly like to take photos of people. However, it looks as though this lens will be something of a disappointment to landscape photographers and others looking for a very high level of optical performance including sharp edges and corners.