Fuji XT4 auto ISO for video

[nevrozel]

Hi, I had an XT3 and now I have an XT4 since last year, mostly using it for family video shooting. I am quite knowledgeable in video as a enthusiast user but cannot find the solution to a single issue, which I believe might be Fuji specific. 

I have my XT4 setup for video as follows: optimised movie mode, shutter speed on manual 1/50, 25fps, aperture on manual (aperture changes ruin the video with my 18-55 f28-4 Fuji lens) but ISO on auto. I am more of a run&gun type of shooter and coming from a lot of Sonys, I tend to use some auto settings for convenience, in this case the ISO.

The problem I always have with Fuji is that it is very very sensitive with the auto ISO, its values jump up and down like crazy and ruins the video. Even if I have the same scene, just one person in the frame talking or moving a little, the auto ISO gets crazy all the time, brightening and darkening the image non-stop. On my previous Sony cameras (a6300, a6500) the ISO changes were much more stable and consistent, they were not obvious during shooting.

Is there a setting I am missing or a solution to this and still using ISO on auto? 

Thank you for the help!

[Gaman]

Auto aperture and auto iso "stepping" in video mode are well know issues with XT3 and XT4.

Latest fw mitigated (but not solved) the problem.

Besides, from what you described, issue could also be related to the metering setting. Check if you have set spot and if so, switch to multi or average and test again.

Do let we know.

 

Gaetano

[BobB]

Generally, Auto ISO is not recommended for video for the very problem you are having. The solution is to dial in an ISO setting based on the shooting conditions at the time. Sorry if this is not the answer you were hoping for 🙂

[Laci83]

I have had the same issue with my fuji x-s10. Iso changed all the time when the camera was on a tripod and in the church there was hardly any movement or light changes...