Even with the release of the huge hog beast they call the X-H1, The X-T2 is still a great camera for video. But locking in your settings is a problem, especially if you shoot at 24 or 25 FPS.
For decent video, we need to lock in our three exposure controls (Aperture, shutter speed and ISO). Aperture is mostly ok because we set it on the lens, but the aperture rings on some Fuji lenses have little resistance and are easy to move without realizing. ISO is pretty good as we can set it on the top dial and press the lock button. Or we can assign ISO to the front command dial and press said dial to lock it (this is the quickest way). But shutter speed is a real problem if you like to shoot at 24 or 25 FPS. We can choose 1/60th of a sec on the shutter speed dial on the top plate, but to get it down to the required 1/50th of a second we need to use the rear command dial. So far so good, but the rear command dial doesn't lock and they tend to be as loose as a loose thing. I've had this move on me multiple times and it drives me nuts. I don't know why we can’t press the dial in to lock it the same way the ISO dial works.
But there is a solution to this problem that allows us to lock in any of the exposure triangle settings or lock all of them at the same time. Here's how to do it. You will find all of these settings in the menu under Settings - Button/Dial Settings
1. Make sure the rear command dial (or the front command dial if you have them reversed) is set to adjust shutter speed by 3rd stops. You will find this on page 1 of the above-mentioned menu, SS Operation.
2. Next, you will need to change one of your Fn buttons on the X-T2 to 'Lock Settings'. This is on page 4 of the Button/Dial Settings menu. I use the AF/L button because I have back button focus assigned to the rear command dial.
3. Now, with the camera back in normal shooting mode, press the Fn button that you assigned to Lock.
4. Choose 'Function Selection'' and then tick the boxes you wish to lock. I have Shutter Speed ticked, but you might also want to lock Aperture, ISO or both.
5. Now when you want to lock in your setting you just click that Fn button and choose Lock Settings - 'Selected Function' and your Settings will be locked and can’t be moved by accident. This will also lock your shutter speed dial on the top plate, so remember to turn the lock off when you want to change the settings.
That’s it. Any questions just leave them in the comments below and I'll answer them as best I can as soon as I can.