Markus_D

The Nikon 300 4.5 AI-s looks like a good option. However, I am not a nikon knowledgeable person. What is the difference between the AI-s and say an ED version. I see nikon made a 300 f4.0 D ED lens. Will this work with the nikon-fuji converter? And that leads to the suggestion about the sigma - I see there are other sigmas "x" -400mm. They can be obtained in nikon or canon mount. 1. would they also be able to be manually focussed (that is not a problem - I am expecting to do this) and 2. is it better to get them in the nikon mount with nikon - fuji adapter or canon mount with canon - fuji adapter? Thanks for the advice. In the mean time, could anyone start a fuji rumour that the fuji XF 100 - 400 is to be released by the end of 2015 AND MAKE IT HAPPEN? Cheers, Mark

Again, thanks for the replies. From those I believe I can discount my thoughts about the Canon 400 5.6. Yes, the manual focus would be a problem. I like the idea of the Samyang: from both a cost and size, but I have never gotten my head around mirror lenses: they have always had a negative vibe with me. But that is probably because the older (1950 - 1960)type mirror lenses were not good. Nikon P900: hmmmm. Thanks guys. Happy shooting.

Many thanks for the advice. I have the 55-200, 3.5-4.8. Birds and distant wild life. I have had Canon in the past (100-400 on a 7D body) but my body is getting older so changed to Fuji (and very happy about it) for the weight issue. I think the best option mentioned in the short term is to get the canon adapter from metabones and a canon 400 5.6 (Non IS) lens. The other I have been thinking seriously about is as per Larry B. Get a superzoom bridge camera. Have been looking at the new G3x Canon. The positive with this is the 1" sensor and 600x zoom but no viewfinder. I have not yet got freindly with LCD's - I still prefer the viewfinder., Again, many thanks for your suggestions

Whilst waiting for the 100-400 to arrive for the XT-1, can anyone please advise what 400mm options / capabilities are available for the XT-1 with adapters? Thanks, Markus