Nikon Flash and Lenses
The TTL functions won't work on the X Pro 1 but you can use it as an optical slave or with a remote trigger. They do make an F mount adapter but don't believe it will work with G lenses.
I know that Novoflex makes an F mount adapter for M43 that works with G lenses but don't think the have done it yet for Fuji.
|AF4_2483 Surfing the Serengeti by DaveInHouston|
from Hot Air Balloon view
|Peregrine Falcon by Psychic1|
from Best Wildlife Photo of the Week - 4