I've been having a look at how the Fuji X100 compares with a m4/3 camera fitted with an m-mount lens. In this case an Olympus E-PL2 plus a Zeiss 18mm f/4 Distagon. Theres some findings and samples on my blog at:- Soundimageplus: Fuji X100 compared to Olympus E-PL2 plus Zeiss 18mm I have a few comparison pictures which are available in larger sizes on flickr. While the Olympus / Zeiss images aren't bad, in fact they are very good, I preferred the Fuji images in terms of luminance noise, sharpness and colour. The interior shots are at ISO 200. I did a few comparisons outdoors as well. There are of course size and depth-of-field differences and this is far from a strict technical test, but I am constantly amazed by just how good the X100 is in terms of image quality. Another thing that impresses me is how good the metering is. Its very consistent and suits the way I shoot very well. If Fuji ever put together a CSC based on this, with an optical finder setting for each lens then it could be a remarkable system.