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R5 Mark II Hot/Dead Pixels

ringoes9
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p.1 #1 · p.1 #1 · R5 Mark II Hot/Dead Pixels

I got my R5 Mark II yesterday. However, I am seeing two hot pixels (one red color and one white color) in VF when the lens cap is placed on the lens. If I removed the lens cap and point the camera to a dark background, I am still able to see the red pixel.

Are hot pixels common in R5 or R5 Mark II? I have not seen them in Sony or Nikon cameras that often.

Sep 15, 2024 at 09:20 PM

moondigger
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p.1 #2 · p.1 #2 · R5 Mark II Hot/Dead Pixels

Figure out if these are in the sensor (show up in photos) or in the viewfinder only. Also, check to see if the rear LCD shows the same hot pixels in the same locations.

That said, I haven’t noticed any hot, stuck, or dead pixels in a Canon camera my son or I has owned since the 5D mark II, and that was an LCD thing, not in the sensor. Those include two 5D III, one 7D, one 7D II, one SL1, one 80D, one 5D IV, two M50s, one M6 II, one R, one R5, and one R7. Unless I’m forgetting something, which is possible.

Edit: I had a vague memory of having dealt with a hot or stuck pixel more recently, so I searched the archives and found that I had written about it here several years ago. In a larger discussion about the differences between hot and stuck pixels, I wrote this (edited here to leave out bits that were only relevant to that older discussion; also, you will have to click the “Show more” option to see the entire quote):

moondigger wrote:
Sensors don’t get ‘stuck pixels.’ They can get hot pixels. Hot pixels can be detected by software algorithms, because the anomaly is stored in the image files. If you shoot raw, the hot pixel will be seen in the raw file. If you shoot JPEGs, the hot pixel may be visible in the JPEG. Hot pixels can be supressed using software to ‘map them out.’ This might be done during a sensor cleaning cycle, or using a maintenance routine in a repair facility.

‘Stuck pixels’ can happen on LCDs. Stuck pixels cannot typically be detected by software algorithms, because the anomaly...Show more →

Edited on Sep 16, 2024 at 09:02 AM · View previous versions

Sep 16, 2024 at 06:47 AM

jedibrain
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p.1 #3 · p.1 #3 · R5 Mark II Hot/Dead Pixels

Every CMOS sensor has some hot/dead pixels. They are usually mapped out at the factory. Some may die as the sensor ages.

Agree though that you need to figure out if that's on the sensor, or if the display itself (LCD or EVF) is where the pixel is actually stuck. Those too would have some dead pixels, but if there are enough clustered together to be a big issue then it might be worth a warranty fix.

Brian

Sep 16, 2024 at 08:54 AM

moondigger
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p.1 #4 · p.1 #4 · R5 Mark II Hot/Dead Pixels

jedibrain wrote:
Every CMOS sensor has some hot/dead pixels. They are usually mapped out at the factory. Some may die as the sensor ages.

Right. I didn't mean to imply that none of those cameras had/have hot or dead pixels. Only that they had none that weren't already mapped out at the factory, and nothing new that was visible while I owned the cameras.

Sep 16, 2024 at 09:42 AM

lighthound
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p.1 #5 · p.1 #5 · R5 Mark II Hot/Dead Pixels

You could try doing a manual sensor cleaning for a minute with lens cap on. I've heard it might take a couple of these cycles to get dead pixels cleaned up.

Sep 16, 2024 at 10:25 AM

Jeff
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p.1 #6 · p.1 #6 · R5 Mark II Hot/Dead Pixels

The R5 has tons of hot pixels, and the 'manual sensor clean' method of forcing the camera to map them out seems not to work. At all.

Sep 16, 2024 at 10:32 AM

mogul
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p.1 #7 · p.1 #7 · R5 Mark II Hot/Dead Pixels

Doesn't Canon have auto mapping like Sony?

Sep 16, 2024 at 11:43 AM

Mike Jacks0n
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p.1 #8 · p.1 #8 · R5 Mark II Hot/Dead Pixels

mogul wrote:
Doesn't Canon have auto mapping like Sony?

I've haven't had to fix this on any of the last 4 Canon's I've had. But it has been said for a long time that running the sensor cleaning process multiple times will map them out. I believe I did this once and it worked after around 3 or 4 tries. But I guess it makes more sense to call or chat with Canon's support and see if that is how they suggest you fix it. They purposely make sensors with tons of extra pixels so this type of thing will not cause them to be forced to make a costly repair. So I'm thinking they have a method to get you sorted out without having to replace anything or take up too much of tech's time.

Sep 16, 2024 at 05:15 PM

ringoes9
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p.1 #9 · p.1 #9 · R5 Mark II Hot/Dead Pixels

For everyone who has R5 Mark II, could you please let me know the following? I am trying to find out whether these red/hot pixels are a common issue in R5 Mark II

1. If you attach the lens with lens cap and looked through the VF (black screen), are you seeing any red or white pixel stuck? I mean these red or white pixels are staying at the same place. If yes, how many of these are visible - 1 or 2 or a few of them?

2. If you remove the lens cap and lens is still attached and point the camera to a dark background (preferably black) and no focus, are you seeing the same spots on the VF

3. Even if you do not put the lens and just lens cap on the body and look through the VF, are you seeing any red or white pixels stuck on the VF

4. Once the picture is taken, are you seeing those same spots in the photos?

Sep 17, 2024 at 06:55 AM

moondigger
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p.1 #10 · p.1 #10 · R5 Mark II Hot/Dead Pixels

Ringoes9,

1. When you use the rear screen as if it was the viewfinder, do you see these red and white pixels?
2. When you take photos under the conditions you describe, are these red and white pixels recorded in the RAW images?

I would run the tests you're requesting if I had an R5 Mark II, but I don't. Nonetheless, it would help if you did the checks I suggest here, so that we can narrow down whether this is an EVF/OLED issue or a sensor issue.

Sep 17, 2024 at 08:21 AM

bobrcw
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p.1 #11 · p.1 #11 · R5 Mark II Hot/Dead Pixels

I had two hot pixels show up a few days after my R5II arrived. They were visible on the rear screen and in the viewfinder with the lens cap on. They were also visible in RAWs viewed at 100% in DPP but not In Lightroom (which automatically removes most hot pixels).

The solution is to run a "Clean now" under Sensor Cleaning as described on page 1152 of the manual. This will usually map them out. Note that selecting manual sensor cleaning will not work.

Sep 17, 2024 at 10:01 AM

gdanmitchell
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p.1 #12 · p.1 #12 · R5 Mark II Hot/Dead Pixels

Every digital camera I have ever owned, at least over the past 20 years, has had some “hot” pixels that show up in files. This applies to Canon and other brands.

As pointed out above, looking at the viewfinder display can’t definitively identify them, as they could be in the viewfinder display rather than the actual image file. First thing you need to do is look at the FILES closely on your computer and see if these hot pixels show up there. If not, you have a (minor) issue with the display. If yes, you have an issue with the sensor.

I’m not familiar with this on the most recent Canon cameras, but most cameras have (as described above) a pixel-mapping function that will find and “map out” (ignore, though I suspect that means substitute an average of adjacent pixel data) the problem pixels.

If you see the issue in the files (not just the viewfinder) use the mapping function and then check again.

I don’t know if it is still the case, but at one time Adobe software also automatically identified and mapped out hot pixels.

Sep 17, 2024 at 11:23 AM

ringoes9
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p.1 #13 · p.1 #13 · R5 Mark II Hot/Dead Pixels

1. I do not see them on the rear screen

2. When I take photos, sometimes I am able to see it. I did not take many photos to validate this.

Sep 17, 2024 at 11:25 AM

ringoes9
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p.1 #14 · p.1 #14 · R5 Mark II Hot/Dead Pixels

Is "Clean now" option recommended by Canon for the hot pixel? I am assuming you are not referring to sensor dust.

Sep 17, 2024 at 11:27 AM

bobrcw
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p.1 #15 · p.1 #15 · R5 Mark II Hot/Dead Pixels

The manual states that performing clean now may reduce "white, red or blue dots that may appear in captured images." Clearly distinct from dust on the sensor. I did one "Clean now" and my hot pixels are gone.

Sep 17, 2024 at 11:44 AM


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