JEH

Re-reading your comment and the last one, it sounds like that glitch with 4K was something different. I wasn't using the EVF but the brightness jumps on screen and is as recorded. I tried using a manual lens to rule out problems with auto aperture and got the same issue. I'll hopefully be able to post a link to an example which was trimmed off the end of about 1minute of recording. Up until 40seconds in, it was rock steady, then this: http://jumpingspider.co.uk/fuji-pentax-lens.mov Wow that was a long wedding speech!

As you say Giulio the problem is most noticeable for me when the scene is static. Have you also found that the exposure jumps around - I get this even with a manual lens attached. Doesn't this issue make the X-T2 nigh on useless for video blogging - and why hasn't more been said about it? Is nobody using their camera X-T2 for video?

Well I was about to send my X-T2 back to Fuji to have this fault fixed. I have been chatting with Fuji UK support dept and they never mentioned that this was a known problem - they suggested sending it back for repair. To be clear, if I start shooting 1080p on a static scene, it's fine for about 45 seconds after which the focus will become unstable and start hunting around. Is this really normal? I also find the exposure will jump up and down ⅓ stop or more. Adam you say this is a known glitch - known by whom and where might I read about this? Since I only have a few days before going on holiday, what's the workaround? Thanks.