AFS-S issue - Returning my XT5

I’ve read a fair few threads and and watched  videos on the AF acquisition being a problem for the XT-5, however my issue has been on static subjects where I can only describe there being a back focus issue.

I’m a long time Fuji user (XE1, XT1, XT3) so feel I have a good understanding. My comparison with my XT3 has shown a difference in the focus. Where there is a muddy look to the shots and on closer inspection the focus is off.

I’ve used focus priority, tripod and decent shutter speeds…1/500 and I still appear to have had the issue consistently on 50% of image to a varying degree.

strange initially I was thinking it was user error, or one of the settings, but hacking by chance seen a discussion by another user with the same issue, then I acknowledged it was a camera issue.

will look at another body, or maybe an XH2. Would be interesting if this issue has manifested for others. 
The million dollar question is whether Fuji has a firmware update in the works. There should at least be some acknowledgment.

The strange thing is I get a positive green box confirmation that focus has locked on a static subject.

When reviewing after some images the focus is not where I’d  had the green box. On other images it’s not in focus at all.

These are also taken at f8 1/250 and it almost looks like extreme defraction

If the camera isn't on a tripod, that could easily be your issue. More resolution means less camera shake allowed for a sharp image.

dual12 wrote:

If the camera isn't on a tripod, that could easily be your issue. More resolution means less camera shake allowed for a sharp image.

Totally agree and this was a common topic years ago when we had hikes in MP in DSLRs.

I’d tested on tripod and the same results. Having said that 1/500 with Ibis I would have thought this  would be sufficient. The result vary from wrong focus point to totally softish images.

Cream17 wrote:

dual12 wrote:

If the camera isn't on a tripod, that could easily be your issue. More resolution means less camera shake allowed for a sharp image.

Totally agree and this was a common topic years ago when we had hikes in MP in DSLRs.

I’d tested on tripod and the same results. Having said that 1/500 with Ibis I would have thought this would be sufficient. The result vary from wrong focus point to totally softish images.

Well, let’s see one - along with a description of exactly how you went about focusing (or not, as the case may be). I never miss with my aging X-T2 or newer X100V and I can’t imagine the X-T5 being any different.

May or may not be true, but I have read several places that diffraction does occur much sooner in this 40MP camera. So after 5.6 apparently there can be issues.

janist74 wrote:

What do you want to see on an out-of-focus image?

Because muddy image isn't a clearly defined term..

johncecilian wrote:

May or may not be true, but I have read several places that diffraction does occur much sooner in this 40MP camera. So after 5.6 apparently there can be issues.

Diffraction effects will never be worse relative to the old sensor.

Erik Baumgartner wrote:

Cream17 wrote:

dual12 wrote:

If the camera isn't on a tripod, that could easily be your issue. More resolution means less camera shake allowed for a sharp image.

Totally agree and this was a common topic years ago when we had hikes in MP in DSLRs.

I’d tested on tripod and the same results. Having said that 1/500 with Ibis I would have thought this would be sufficient. The result vary from wrong focus point to totally softish images.

Well, let’s see one - along with a description of exactly how you went about focusing (or not, as the case may be). I never miss with my aging X-T2 or newer X100V and I can’t imagine the X-T5 being any different.

I've never had this issue and I started with the trusted  XE1, XT1,XT3

You seem to be be convinced that it's user error from your remark. Will dig out something to post

Cream17 wrote:

Erik Baumgartner wrote:

Well, let’s see one - along with a description of exactly how you went about focusing (or not, as the case may be). I never miss with my aging X-T2 or newer X100V and I can’t imagine the X-T5 being any different.

I've never had this issue and I started with the trusted XE1, XT1,XT3

You seem to be be convinced that it's user error from your remark. Will dig out something to post

The X-T5 is a more complex device with IBIS. It is entirely possible that the body has some kind of issue due to sample variation. On the other hand, it is entirely possible that the OIS/IBIS might not have settled before shutter release, or a lens zooming action has caused the problem, but usually this wouldn't cause consistent back focus.

Cream, please try to document the situations where this is cropping up most. Is it consistent with various lenses? Does it show up usually with the first image taken? Trying to isolate circumstances will help the diagnosis.

Cream17 wrote:

dual12 wrote:

If the camera isn't on a tripod, that could easily be your issue. More resolution means less camera shake allowed for a sharp image.

Totally agree and this was a common topic years ago when we had hikes in MP in DSLRs.

I’d tested on tripod and the same results. Having said that 1/500 with Ibis I would have thought this would be sufficient. The result vary from wrong focus point to totally softish images.

Could it be that your XT5 is bad? Can you test another one? Do you want maybe to describe the test conditions and have me test mine? I have only had the camera for a few days and have not tested it thoroughly but have not noticed something like that.

If you have certain conditions and subject, happy to assist with testing during the weekend.

Cream17 wrote:

Erik Baumgartner wrote:

Cream17 wrote:

dual12 wrote:

If the camera isn't on a tripod, that could easily be your issue. More resolution means less camera shake allowed for a sharp image.

Totally agree and this was a common topic years ago when we had hikes in MP in DSLRs.

I’d tested on tripod and the same results. Having said that 1/500 with Ibis I would have thought this would be sufficient. The result vary from wrong focus point to totally softish images.

Well, let’s see one - along with a description of exactly how you went about focusing (or not, as the case may be). I never miss with my aging X-T2 or newer X100V and I can’t imagine the X-T5 being any different.

I've never had this issue and I started with the trusted XE1, XT1,XT3

You seem to be be convinced that it's user error from your remark. Will dig out something to post

User error in the sense of stopping down to f/8 on an APS-C camera with 40 MP, yes, that is what I think at least being part of the reason for lack of detail / sharpness.

Dan

DanFry wrote:

Cream17 wrote:

Erik Baumgartner wrote:

Cream17 wrote:

dual12 wrote:

If the camera isn't on a tripod, that could easily be your issue. More resolution means less camera shake allowed for a sharp image.

Totally agree and this was a common topic years ago when we had hikes in MP in DSLRs.

I’d tested on tripod and the same results. Having said that 1/500 with Ibis I would have thought this would be sufficient. The result vary from wrong focus point to totally softish images.

Well, let’s see one - along with a description of exactly how you went about focusing (or not, as the case may be). I never miss with my aging X-T2 or newer X100V and I can’t imagine the X-T5 being any different.

I've never had this issue and I started with the trusted XE1, XT1,XT3

You seem to be be convinced that it's user error from your remark. Will dig out something to post

User error in the sense of stopping down to f/8 on an APS-C camera with 40 MP, yes, that is what I think at least being part of the reason for lack of detail / sharpness.

Dan

The 40MP sensor won’t suffer any lack of detail/sharpness due to diffraction at f/8 relative to the old sensor. You may be able to achieve greater resolution at wider apertures with the new sensor, but you aren’t going to be any worse off than before at f/8. With the possible exception of noise, you should always get better image quality with a higher resolution sensor than a lower resolution one regardless of the lens/aperture.

What? Did I just read again, that another X-T5 user reports false focus box confirmation in this new improved Fuji auto focus system? What is going on here?

I have noticed, in this thread an AF issue is being discussed without seeing a single photo. Sharing one or two images could be so helpful.

ISO 125 1/250s f10 36mm

Focus confirmation box was half way along the wall, yet focus appears to be at the bottom right of the wall where the crack appears.

ISO 400 1/500s f8 55mm

focus confirmation was left side, crop below :-