**Update** To rule out any mechanical faults with the Kipon adapter I plan on trying another adapter but may wait until the official Fuji one comes out. In the meantime, if you have tried an adapter with leica fit lenses wide open with any more success than I have had, please do drop me a line. Properly functioning Leica glass on this sensor would be fantastic.
**Update 2** For Geeks, the answer probably resides with the following:
2. Thickness of filter covering sensor:
- Leica M8 = 0.5mm
- Leica M9 = 0.8mm
- Fuji X-Pro 1 = 2.5mm