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Archive 2022 · XT5 white specs?

  
 
RoamingScott
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p.2 #1 · XT5 white specs?


Swap the camera so you can satisfy your own concern. If it's present after that, then perhaps the sensor isn't for you.


Nov 29, 2022 at 02:47 PM
tammons
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p.2 #2 · XT5 white specs?


RoamingScott wrote:
You're testing at ISOs that are highly recommended to be avoided on Fuji.


Why?
Why more so than any other camera with the same pixel pitch.



Nov 29, 2022 at 02:53 PM
RoamingScott
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p.2 #3 · XT5 white specs?


tammons wrote:
Why?
Why more so than any other camera with the same pixel pitch.


It's been reported that the 40mp sensors of this new gen are of equal performance noise to IQ vs the old gen.

It's pretty common knowledge that ISO 6400 on Fuji, unless shooting in B/W, is gonna be a bad time.

Either way, only you can decide what works for you. Not sure if those images in the OP would be keepers for you at that softness and lack of detail, but certainly wouldn't be for me, which is why I keep my Fuji below 3200.



Nov 29, 2022 at 02:58 PM
Joseph Marney
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p.2 #4 · XT5 white specs?


This is a discussion regarding the performance of a new camera/sensor and a peculiarity that may effect the workability of it for myself an others. This discussion may help others who are looking at these cameras to decide if it is right for them. Scott, if you don't want to hear about it, perhaps this thread isn't for you.

I don't need to you to tell me to "swap the body", thank you. I will do so if I see fit. As I have shared, and you may have missed, I have both the X-H2 and X-T5 side-by-side, with identical output.

The characteristic is different than that of the X-T4, and I think that is of note. The specks appear in lower ISO files as well when pushed. I would have to do further testing to see where the floor is. I do know that ISO 125 pushed 4 stops does not exhibit the specks at all.



Nov 29, 2022 at 03:00 PM
RoamingScott
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p.2 #5 · XT5 white specs?


Joseph Marney wrote:
This is a discussion regarding the performance of a new camera/sensor and a peculiarity that may effect the workability of it for myself an others. This discussion may help others who are looking at these cameras to decide if it is right for them. Scott, if you don't want to hear about it, perhaps this thread isn't for you.

I don't need to you to tell me to "swap the body", thank you. I will do so if I see fit. As I have shared, and you may have missed, I have both the X-H2 and X-T5 side-by-side, with
...Show more

I'm literally not even talking to you...are you confused?



Nov 29, 2022 at 03:05 PM
tammons
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p.2 #6 · XT5 white specs?


RoamingScott wrote:
It's been reported that the 40mp sensors of this new gen are of equal performance noise to IQ vs the old gen.

It's pretty common knowledge that ISO 6400 on Fuji, unless shooting in B/W, is gonna be a bad time.

Either way, only you can decide what works for you. Not sure if those images in the OP would be keepers for you at that softness and lack of detail, but certainly wouldn't be for me, which is why I keep my Fuji below 3200.


No. They are not keepers. I was testing and was curious about the noise.



Nov 29, 2022 at 03:06 PM
Joseph Marney
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p.2 #7 · XT5 white specs?


RoamingScott wrote:
I'm literally not even talking to you...are you confused?


Usually.



Nov 29, 2022 at 03:07 PM
mdude85
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p.2 #8 · XT5 white specs?


tammons wrote:
Why?
Why more so than any other camera with the same pixel pitch.


Rest assured there is no such thing as "ISOs highly recommended to be used on Fuji". That should serve as your daily reminder not to give every opinion equal attention.

ISO6400 is a perfectly usable sensitivity... even way higher sensitivities are still usable under the right circumstances.

(Interestingly, if ISO6400 is not usable on a Fuji body then ISO12800 would not be usable on a FF body like a Sony A7RIV, since usually FF bodies give about 1 stop of ISO improvement vs APS-C).

RAW files all go through some sort of noise reduction in the camera. That's part of the process of converting data read by the image pixels into a usable format. I would imagine that OM's noise reduction is fairly aggressive because the sensor is smaller and thus more prone to noise in the first place.


Edited on Nov 29, 2022 at 03:11 PM · View previous versions



Nov 29, 2022 at 03:08 PM
RoamingScott
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p.2 #9 · XT5 white specs?


mdude85 wrote:
Rest assured there is no such thing as "ISOs highly recommended to be used on Fuji". That should serve as your daily reminder not to give every opinion equal attention.

ISO6400 is a perfectly usable sensitivity... even way higher sensitivities are still usable under the right circumstances.

(The interesting thing is that if ISO6400 is not usable on a Fuji body then ISO12800 would not be usable on a FF body like a Sony A7RIV).

RAW files all go through some sort of noise reduction in the camera. That's part of the process of converting data read by the image pixels into a
...Show more

Actually, there are two ISOs highly recommended to be used on Fuji...base ISO, and where dual gain kicks in. Anything else is needlessly noisy if you can avoid it.

I already said if the middling IQ of ISO 6400 and above is satisfactory for a person, they should use it.



Nov 29, 2022 at 03:11 PM
mdude85
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p.2 #10 · XT5 white specs?


RoamingScott wrote:
Actually, there are two ISOs highly recommended to be used on Fuji...base ISO, and where dual gain kicks in. Anything else is needlessly noisy if you can avoid it.

I already said if the middling IQ of ISO 6400 and above is satisfactory for a person, they should use it.


Well, no one "recommends" (let alone "highly recommends") any ISOs.

It would be like saying 1/3200 is a "highly recommended" shutter speed.

ISO is just a way to adjust exposure. There is no objectively "good" or "bad" ISO.

As you said, any ISO can be used as long as it's satisfactory for the user.



Nov 29, 2022 at 03:32 PM
tammons
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p.2 #11 · XT5 white specs?


What is the dual gain of the XT5?


Nov 29, 2022 at 03:38 PM
Joseph Marney
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p.2 #12 · XT5 white specs?


Dual gain is 125/500, I believe. I looked at some ISO 500 photos and pushed them to see if it might be connected to that, but the ISO 500 image was clean when pushed.


Nov 29, 2022 at 03:48 PM
RoamingScott
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p.2 #13 · XT5 white specs?


Yep, it's 500 for the 40mp sensors. Seen some reports that the XH2s is also 500, not sure if confirmed. The last gen was 640.


Nov 29, 2022 at 03:53 PM
gdanmitchell
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p.2 #14 · XT5 white specs?


Joseph Marney wrote:
I'm attaching a crop that has been significantly downsized. The left hand side is pulled, the right is original exposure.


OK, now I'm even more confused by your example.

Originally I thought you were taking an out-of-camera exposure at the very high ISO and simply looking at it at a very high magnification factor.. But it looks like you took a very underexposed area of the right image and pushed the badly lit shadows by the equivalent of a bunch of stops.

If you are pushing the nearly black deep shadow area of the right half image shot at 6400 or higher in order to get the exposure we see in the left half, I think that there are a few take-aways to consider:

1. It is no surprise that the left side looks awful.

2. With such a super-bright area on the right, why would you use such a high ISO?

3. Aren't we really looking more at how a poorly lit and exposed exposure fails, and not so much an indication of the defects of a camera? (In the real world you would almost certainly not make this photograph this way — you might fill the dark area with a reflector or electronic flash... but you'd really probably move the lens to a different location without that extremely bright background on the right side!

This reminds me to the "tests" we used to see in forums and elsewhere that "proved" that some sensor has terrible banding, poor gradients in the shadows, awful noise, and so forth... which were based on making a "photograph" with the lens cap on and then pushing the resulting 0 luminosity value image by 8-10 stops. (The cooking equivalent would be to toss a steak on the barbecue for twelve hours and point out that it was overdone...)

This sort of thing can be kind of useful for identifying the edge case failure mode for various cameras — and they all will fail this test in some way. But it isn't predictive of real-world performance.

If you are in the habit of lighting and exposing this way and then doing what you did here in post...

... you probably need something other than a APS-C camera from Fujifilm.

The general rule is that if you are really going to. push the outer boundaries of current camera/sensor technology with extremely high ISOs as a major portion of your work, you are probably better served by a full frame or larger sensor camera with less-than-the-maximum sensor resolution — e.g. a larger sensor where photo site size is larger at the expense of resolution.

Again, in my experience (a lot of which is doing handheld night photography in the urban street environment using Fujifilm cameras), qualty I have no concerns getting quality at ISO 200, 400, and 800. I can get quite excellent results after normal post processing at 1600 ISO, and quite decent results at 3200. I prefer not to go above 3200 for my photography, but I can and do get workable images at ISO 6400, but I virtually never go higher. (My standard for image quality is that at 20" x 30" print should look very good.)

Good luck.



Edited on Nov 29, 2022 at 04:32 PM · View previous versions



Nov 29, 2022 at 04:20 PM
Cliff L.
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p.2 #15 · XT5 white specs?


There have been complaints of white spots on the sensors of Fuji cameras going all the way back to the launch of the X series cameras nearly a decade ago. It's disappointing to hear this same issue is cropping up again...


Nov 29, 2022 at 04:31 PM
Sharona
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p.2 #16 · XT5 white specs?


I am a little confused. Weren't these cameras tested and put through the paces? Why are there no reviews about this? If there are, do share. Are we talking about extreme ISOs that the majority of photographers rarely use?


Nov 29, 2022 at 04:46 PM
Sharona
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p.2 #17 · XT5 white specs?


molson wrote:
There have been complaints of white spots on the sensors of Fuji cameras going all the way back to the launch of the X series cameras nearly a decade ago. It's disappointing to hear this same issue is cropping up again...


I have never seen white spots in my XH-1 or XT-3 images.



Nov 29, 2022 at 04:47 PM
gdanmitchell
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p.2 #18 · XT5 white specs?


molson wrote:
There have been complaints of white spots on the sensors of Fuji cameras going all the way back to the launch of the X series cameras nearly a decade ago. It's disappointing to hear this same issue is cropping up again...


I have not seen those reports. Can you give us some links please?

Edited on Nov 29, 2022 at 05:07 PM · View previous versions



Nov 29, 2022 at 05:06 PM
Joseph Marney
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p.2 #19 · XT5 white specs?


gdanmitchell wrote:
Pure eloquence...



You are reading into my example quite a bit, and maybe haven't read my other posts. This was an example of an exposure pulled and downsized. I have also stated that the specks are visible in images that are not pushed. In this case, the right side of the image does not have visible specks when downsized, although it does at full size. Like most folks, my final images are not intended for 100% viewing, which typically allows for greater malleability - that's what I was looking for here.

I have already disclosed that I tend to push and pull a lot - particularly pushing shadows when exposed for the highlights. Doing so is far from a lens cap torture test. Nor am I in the habit of doing tests - I happened to notice the topic today and had seen it in images I'd recently taken, so I chimed in.

The discussion of what level of high ISO is right for each photographer is subject to tolerance, preference, display size, etc. The size and shape of the regular "grain" is definitely a matter of preference. But when we encounter irregular noise, such as banding, pattern noise, color shifts, and in this case, bright white specs, there is typically discussion about the phenomenon, if it is being experienced by all or most shooters of that camera, and if there is a way to mitigate it, such as using a different raw editor or adjusting NR setting in the camera.

For some use cases, ISO 6400 from an X-T4 is just fine. If, at the same settings, an X-H2 looks like it has dust on the photo...folks are going to point it out.

As an aside, I've gone through just about every brand and haven't found my glass slipper yet. For a while I was shooting GFX alongside X, which was great except for the price and weight of 2 systems. I travel a lot and prefer to have all my gear in my backpack when I fly. I also shoot a lot of hybrid events, photos and informal interview back to back.

Fuji X has a lot going for it in this workflow - I was able to capture a panel of space nerds at 8k, knowing I'd be producing at 1080P - allowing me to punch in to any of the panelists individually. Since I didn't have to work a second camera for video, I was able to work the room taking photos during the panel. The X system is the cheapest mirrorless setup that can do that right now, with the Canon R5 and glass being a significantly larger investment as the next step up. The lighter weight of the X system is also more gimbal friendly.

So there is a reason I'm shooting X, and no, it's not for high ISO malleability - but I'll always take what I can get. The "if it doesn't work for you shoot something else" is tiresome and unhelpful - every system has it's compromises, and folks are always going to try to get the most out of what they have. I could bitch about every one them.

All that being said, I probably will re-incorporate GFX back into my setup, or pivot back to Canon.

Anyway, I'm sorry if that image misled the discussion down a different path. The two images below are at correct, default exposure - the second being DPR's test studio scene.















Nov 29, 2022 at 05:07 PM
gdanmitchell
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p.2 #20 · XT5 white specs?


Joseph Marney wrote:
You are reading into my example quite a bit, and maybe haven't read my other posts. This was an example of an exposure pulled and downsized. I have also stated that the specks are visible in images that are not pushed. In this case, the right side of the image does not have visible specks when downsized, although it does at full size. Like most folks, my final images are not intended for 100% viewing, which typically allows for greater malleability - that's what I was looking for here.

I have already disclosed that I tend to push and
...Show more

I was actually going to mention GFX/Canon in my reply but decided to keep it generic and just mention larger sensor and lower MP count. Of course, Sony has some cameras that can do very well at super-high ISOs, and although I'm not familiar with them I'll be Nikon does, too.



Nov 29, 2022 at 05:09 PM
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