FUJI X-H1 - Aperture Flickering and AF-S preview issues

baobob wrote:

I tried the test with my XH1 and my XT3 with the 18-55mm at f18

It does flicker during 1 sec in AFS when you just release the half pres

Moreover it does the same thing with the 18-135mm at 18mm f18

It is noiser with the 18-55mm

It seems it is just inherent to the Fuji system

Bad news so, on other systems doesn't happen, like on my Lumix with all previews on. Maybe the possibility to disable Dof preview can help (like in MF mode), but some x-t2 users noticed it after a firmware update based on the EVF response, and change in sensor image readout maybe.
It's still annoying, the strange fact is that the iris move very fast in MF mode, open and close istantly, I understand the Dof preview in AF-S mode but I can't understand why it's so imprecise with many steps to get into the position it was right before the half press. (this cause the annoying flickering, need to be more precise and faster in the preview, but I have not so much hope considering every single XF lens has stepping aperture problem, even compared to cheaper Lumix lenses)

Fuji just slowed down the iris programmatically so it moved slowly step by step which is causing this "issue". I have the same on my xt-20. You should just live with it

aliksays wrote:

Fuji just slowed down the iris programmatically so it moved slowly step by step which is causing this "issue". I have the same on my xt-20. You should just live with it

What's the point of slowing it down?
If this is the result it breaks the shooting experience. Better evf response? good, but the experience has become worse in the overall experience.

Mike1988 wrote:

"So, as for someone else in various posts, I've received the "official" answer and this behavior is "normal", less visibile and more fluid on newer models but there." I know nothing is broken but frankly it's annoying, I have the diaphgram with some lenses noiser than X-H1 mech. shutter, expecially when you leave the shutter button in AF-S or in contrasty scene. Not considering also the absence of smooth transition, because the camera try do gives you a balanced view, and to do it uses the iris itself but.. XF lenses are not smooth speaking of aperture. Sometimes I can see it goes "up and down" and the aperture preview fight with the change in shutter speed, there is no priority in this.. where maybe the optimal view may be adjusted right only the proper shutter speed is achieved, like in MF mode when changing the light source. It's very visibile on strong light difference, but also while doing some street or landscape you can clearly see that flickering after depressing the shutter or when you try to catch the focus more than one more time. On other competitors it doesn't happen also because, expecially on Lumix, iris is fluid and you get a very smooth preview almost in every situation.
.
Two solutions for me:

- menu settings to manage the type of Live preview via FW update, not only for manual exposure more (also DoF)

- XF lenses with a fluid diaphgram, but I can't find one at the moment iirc
(newer 27 and 10-24 seems to have same "behavior")
.
I don't know, to me it's a "problem" able to affect the shooting experience.

You can just turn off the exposure preview (Life VIew like). Maybe, this will help. But personally I think it will cause more issues with your shooting experience because you will have to rely on your shooting experience and keep the settings in mind imagining what will be the output. ) It will bring you back to the old film-like era

aliksays wrote:

Mike1988 wrote:

"So, as for someone else in various posts, I've received the "official" answer and this behavior is "normal", less visibile and more fluid on newer models but there." I know nothing is broken but frankly it's annoying, I have the diaphgram with some lenses noiser than X-H1 mech. shutter, expecially when you leave the shutter button in AF-S or in contrasty scene. Not considering also the absence of smooth transition, because the camera try do gives you a balanced view, and to do it uses the iris itself but.. XF lenses are not smooth speaking of aperture. Sometimes I can see it goes "up and down" and the aperture preview fight with the change in shutter speed, there is no priority in this.. where maybe the optimal view may be adjusted right only the proper shutter speed is achieved, like in MF mode when changing the light source. It's very visibile on strong light difference, but also while doing some street or landscape you can clearly see that flickering after depressing the shutter or when you try to catch the focus more than one more time. On other competitors it doesn't happen also because, expecially on Lumix, iris is fluid and you get a very smooth preview almost in every situation.
.
Two solutions for me:

• menu settings to manage the type of Live preview via FW update, not only for manual exposure more (also DoF)
• XF lenses with a fluid diaphgram, but I can't find one at the moment iirc
  (newer 27 and 10-24 seems to have same "behavior")
  .
  I don't know, to me it's a "problem" able to affect the shooting experience.

You can just turn off the exposure preview (Life VIew like). Maybe, this will help. But personally I think it will cause more issues with your shooting experience because you will have to rely on your shooting experience and keep the settings in mind imagining what will be the output. ) It will bring you back to the old film-like era

Nope, you can't apart from manual exposure mode as states before, no solution in aperture priority for example. But it defeats the advantage of a mirrorless with the instant preview, at least disabling Dof preview like in MF may help but you can't do it in AFS, where camera always want to decide the "better" viewing .. using a not step less or without having more fast and precise iris in the lenses, maybe.