A Sigma 50-500 EX f/4-6.3 EX DG RF HSM should fully work on the Fuji S1 pro, providing its the Nikon AF mount version. I owned an S2 I know no principle difference between S1 and S2 base camera. I did not try a 'bigma' but I never a compatibility issue with any lens. Focus should be okay at f6.3 although I would expect operation slow.
Best to try in a local camera shop and rest your fears - dont have to buy just give it a good tryout and say you need some time to think!
|