topic Re: EOS R6 Mark II viewfinder and screen brightness issue in EOS DSLR & Mirrorless Cameras

EOS R6 Mark II viewfinder and screen brightness issue

Stef71 — Mon, 10 Nov 2025 12:18:51 GMT

I was taking pictures in low light with my R6II pushing the boudary and while they looked fine in the viewfinder and on screen (both while taking the pictures and in viewing them after they have been taken) Back home on my computer they are way too dark (the computer screen is calibrated so that should be just fine, also I tried viewing them on another computer to be sure) I tried to set the brightness for both to match what I got on the computer and I had to go back to setting 1 to get anywhere near (and it's still a bit brighter though). I know I should have used the histogram but sadly I didn't 'cous it works fine in 'normal' light conditions. Is there another setting I should have checked or is this a real issue?

Re: EOS R6 Mark II viewfinder and screen brightness issue

shadowsports — Mon, 10 Nov 2025 15:06:47 GMT

Greetings ,

The pictures look fine on your camera, right?

Please tell us the format your images are being saved in RAW, jpeg, etc

What application are you using to view the pictures on your computer?

We can elaborate further once we have answers to the questions above.

Re: EOS R6 Mark II viewfinder and screen brightness issue

p4pictures — Mon, 10 Nov 2025 15:22:32 GMT

If you can put the card back in the camera then you should do that. Press the playback button and then press the INFO button until the histogram is shown. At this point if the histogram is mostly on the left side of the scale then they are likely to be underexposed, if the histogram is spread over the scale from the left to the right side then it's a reasonable exposure.

This will tell you if it is the camera or the computer that has the issue. Also note that if you are using Windows, then the MS Photo app automatically enhances images - and often does a poor job of that. I'd get a hold of Canon Digital Photo Professional (DPP) form the Canon support pages for your camera and see what it shows.

Re: EOS R6 Mark II viewfinder and screen brightness issue

ebiggs1 — Mon, 10 Nov 2025 15:26:19 GMT

There is no good reason to not get DPP4. It is a free d/l and it is a very capable app. The best option for you is to u/l an unprocessed file so we can check it out.

Re: EOS R6 Mark II viewfinder and screen brightness issue

Stef71 — Tue, 11 Nov 2025 06:36:14 GMT

I shoot in RAW and Jpeg and use Affinity for post and the basic windows viewer. RAW is RAW so there could (and should) be a differnece between camera and computer but also de straight out of camera Jpeg looks way brighter on display than on PC and Laptop. Never noticed it before, it looks fine with pictures taken by normal lighting, these were taken in low light ...

Re: EOS R6 Mark II viewfinder and screen brightness issue

stevet1 — Tue, 11 Nov 2025 16:04:05 GMT

Stef71,

The pictures you took in low light...

What were some of the settings you used?

Steve Thomas

Re: EOS R6 Mark II viewfinder and screen brightness issue

Stef71 — Wed, 12 Nov 2025 07:05:30 GMT

It varies on different shots but generally I was shooting birds with extender on lens so f13 fixed becouse of that and high shutterspeeds like 1/500 up to 1/1000, AWB, Auto ISO, exposures just in minus, didn't check the histogram (my bad)

Re: EOS R6 Mark II viewfinder and screen brightness issue

shadowsports — Wed, 12 Nov 2025 10:41:30 GMT

Greetings,

Take note of Brian's comment. Raw is RAW, but if you use Windows photos to view your RAW images, they will appear darker. This application does not necessarily interpret the files correctly so they appear darker than they are. You still have some work to do in order to determine if there is an issue.

Re: EOS R6 Mark II viewfinder and screen brightness issue

Stef71 — Wed, 12 Nov 2025 12:57:34 GMT

Also, Take note of my comment, it's not just RAW viewed in Windows photo's it's RAW and straight out of camera Jpeg, and also in Affinity, on multiple screens on different computers with calibrated screen. Never had issues like this with low light photo's from my 6DII.

Re: EOS R6 Mark II viewfinder and screen brightness issue

jrhoffman75 — Wed, 12 Nov 2025 13:02:53 GMT

@Stef71 wrote:

Also, Take note of my comment, it's not just RAW viewed in Windows photo's it's RAW and straight out of camera Jpeg, and also in Affinity, on multiple screens on different computers with calibrated screen. Never had issues like this with low light photo's from my 6DII.

Post one of the problem files (RAW) in DropBox or One Drive so we can examine.

Re: EOS R6 Mark II viewfinder and screen brightness issue

Stef71 — Wed, 12 Nov 2025 13:14:40 GMT

The issue is not the file itself, it is too dark and I'm aware of that, but the camera shows it off as acceptable dark as all the rest says way too dark.

Re: EOS R6 Mark II viewfinder and screen brightness issue

stevet1 — Wed, 12 Nov 2025 13:30:57 GMT

Stef71,

With settings of f/13, and a shutter speed of 1/500 to 1/1000 with a teleconverter in low light, I would expect dark pictures.

I don't know how the R6 MII behaves, but on my camera (a T8i), I can't playback images in my viewfinder.

It's possible that you have the brightness on your LCD screen set too high.

Steve Thomas

Re: EOS R6 Mark II viewfinder and screen brightness issue

jrhoffman75 — Wed, 12 Nov 2025 13:58:39 GMT

Do you mean that the rear LCD shows it as OK when you review it on the camera?

Does the camera histogram match what your computer editing software shows?

Re: EOS R6 Mark II viewfinder and screen brightness issue

Stef71 — Wed, 12 Nov 2025 14:15:39 GMT

The histogram does look the same in both, but as I didn't check it while shooting I didn't see it was going to be too dark as the display tels a different story (on display lt looked acceptable both while shooting and in play back) The display and viewfinder settings for brightness were both standard 4 (out of 7). I tried to get the pictures to match brightness on computer but putting the settings all the way back to 1 still a bit brighter and thats (I think) way too much difference to be normal

Re: EOS R6 Mark II viewfinder and screen brightness issue

jrhoffman75 — Wed, 12 Nov 2025 14:21:02 GMT

@Stef71 wrote:

The histogram does look the same in both, but as I didn't check it while shooting I didn't see it was going to be too dark as the display tels a different story (on display lt looked acceptable both while shooting and in play back) The display and viewfinder settings for brightness were both standard 4 (out of 7). I tried to get the pictures to match brightness on computer but putting the settings all the way back to 1 still a bit brighter and thats (I think) way too much difference to be normal

And you had Exposure Sim selected?

Re: EOS R6 Mark II viewfinder and screen brightness issue

Stef71 — Wed, 12 Nov 2025 14:23:19 GMT

Hmmm I have to check that. But that shouldn't affect viewback though ...

Re: EOS R6 Mark II viewfinder and screen brightness issue

jrhoffman75 — Wed, 12 Nov 2025 14:30:25 GMT

If you have the OVF simulation selected the EVF doesn't reflect the scene conditions.

I ran a test on my R6M2 and if I lower the exposure comp by -3 the EVF darkens and the playback image looks the same.

Re: EOS R6 Mark II viewfinder and screen brightness issue

Stef71 — Wed, 12 Nov 2025 14:34:24 GMT

Im gonna check that (later as I'm not at home right now)

Re: EOS R6 Mark II viewfinder and screen brightness issue

ebiggs1 — Wed, 12 Nov 2025 15:10:38 GMT

"I didn't see it was going to be too dark as the display tels a different story ..."

The LCD is not the same as your computer monitor. Both have settings you can adjust.

Re: EOS R6 Mark II viewfinder and screen brightness issue

Stef71 — Thu, 13 Nov 2025 06:22:05 GMT

Have the settings on camera display set way back at 1 and still much lighter than on computer, the difference is just too much