I'm using this as a hack with a Fuji X100, a 49-46mm step down ring and the Fuji lens adapter ring to get a 24mm (equiv) wide angle view instead of the 28mm (equiv) that the Fuji Wide Angle Adapter lens offers. (This is WAY less expensive than the Fuji OEM option too and still great glass.) Lots of articles out there on how to make this happen. Highly recommended if you have any of the Fuji X100 bodies and like to shoot wider.