You can toggle "Preview Depth of Field" to do this. When "on", the aperture will open and close in real time in accordance with your aperture setting.
I believe I’d you rotate aperture ring while half pressing shutter, it will change in real-time.
Thank you! I can make it work by assigning PREVIEW DEPTH OF FIELD to a Fn key, but I have to activate it agin after I press the shutter. Is there any way to set it On all the time as default?
You're welcome. I'm afraid I don't know of a method for forcing the depth of field preview to remain engaged. It tends to disengage the moment you invoke a menu or, as you say, press the shutter button.
I'm just curious, what's the benefit of being able to do this for you?
It will let you see how much actual DOF you have to work with at your chosen aperture. With focus peaking on, it can help you to place the focus point for optimal effect. Also with peaking on, in a grassy field, you will get a pretty good picture of where the focal plane is, its relative depth, and will clearly show any field curvature your lens might have at different apertures - a worthwhile educational exercise.
All very much true, thank you.
Can’t speak for OP but if you’ve ever used a manual aperture lens, it’s nice to see the DOF change in real-time without needing to lock exposure or press any additional buttons. The only reason it stays wide open prior to the moment you have shutter press is simply for the AF algorithm to get as much light as possible. Once focus is locked it stops down to whatever aperture is needed. If AF wasn’t a concern, then it would stop down immediately when changing aperture on a Fuji lens. But it doesn’t by design.
