Summary: Simply Stunning. I have the X-E1, the XPro 1 and the X100 so had the choice of buying the 18 mm lens for my two X bodied cameras or this WA adapter. When I bought I had heard the WAA was good, but it was not until I received it and started using it, that I realized how good it truly is. Far better than an "adapter" has any right to be. In fact in IQ, contrast and color it is up there with the best of individual wide angle lens.
Summary: Great lens! When mounted on the X100, one not familiar with the camera can't tell that you have an attachment -- it is so well integrated in terns of appearance and operation. This has been reviewed here before but there is one thing I must add. Be sure to TURN ON the wide-angle option in the setup. This encodes the EXIF so the picture can be identified as one taken with a 19mm lens.
Summary: It is a very nice lens converter, it preserves all the IQ of the Fujifilm X100 and gives the photographer a wider angle of view... it could be wider but it is very good for my needs, im waiting for a tele converter now... come on Fuji! you can do it!
Summary: Quite indistinguishable in quality from original. Quick fix for rear cap issue, the rear thread is 49mm so a second snap (or threaded 49mm) cap will provide secure rear protection when not on camers
Summary: I didn't expect Fujifilm to be so invested in their X100 camera that they would consider releasing a wide angle conversion lens for it, after a year. It's a smart move. I've seen online that many people using their own wide angle converters or adapters, such as the Nikon WC-E68 , Panasonic DMW-LWA52 . I have tried the Nikon WC-E67 and Panasonic DMW-LW46 .