topic Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ? in EOS DSLR & Mirrorless Cameras

Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

azvm — Sun, 29 Oct 2023 13:40:19 GMT

Hello to everyone,

I have bought a Canon R6 MKII about 6 months ago.

And i notice some red dots on a pictures with some long exposure 5s to 10s and iso around 400/800.

I have done sensor cleaning and manual cleaning to see if they go away, but they only reduce the brightness and size, and now i see white and red dots, small but a lot.

I attach the image after the cleaning.

Can some one give me some opinion ?

Thank You/ Kind Regard's

Vitor

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

Waddizzle — Sun, 29 Oct 2023 14:25:13 GMT

My bad eyes do not see any red dots. But I do not doubt they are there somewhere. Maybe the forum’s image filtering and processing cleaned them up. ???

A dead giveaway for “hot pixels” is that they will always appear in the same place in every shot. If they move around, then you are probably looking at sensor noise.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

Waddizzle — Sun, 29 Oct 2023 14:27:17 GMT

I strongly suggest that you stop trying to clean the image sensor. Your camera should still be under warranty after six months. Contact Canon Support.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

azvm — Sun, 29 Oct 2023 16:14:03 GMT

Hello Waddizzle,

Thank you for your replay.

As you mentioned that the upload, could change the images, here is a link to the same, you need to view it a 100%, and the spots are localized on top left side.

https://drive.google.com/drive/folders/1TKTwqkQV9s2HbLn056hLcVLOUZaAga0q?usp=sharing

Thank you,

Vitor

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

Peter — Sun, 29 Oct 2023 16:20:06 GMT

Normal. Canon has a dark frame feature called Long exposure noise reduction. It has been in every EOS since D30 to deal with the problem you have. Activate that and your problem with hot pixels will be gone, but you will increase the time x2.

If you see hot pixels at short shutter speed, use the sensor cleaning method or just let the raw converter remove the bad pixels in post. Make sure you shoot raw, because it is way harder to remove bad pixels for raw converters if the image already is demosaiced.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

azvm — Sun, 29 Oct 2023 16:28:24 GMT

Thank you Peter, i have upload one more couples of images, you can check them now.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

Peter — Sun, 29 Oct 2023 16:36:16 GMT

Nothing unusual in your other samples.

Have fun with my raw file from 6D https://kameratrollet.se/allt/hot-pixlels.CR2

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

azvm — Mon, 30 Oct 2023 10:57:54 GMT

Yes, you have it Peter and very worst, but my camera is 6 months old, yours is ?

So... I think mine at your age (camera) will be much worse....

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

Peter — Mon, 30 Oct 2023 12:07:34 GMT

I have two so I don't know which one it was. The oldest I have is from 2013. I think heat is the biggest problem. (Edit: I checked the serial nr. It was the second 6D from 2018)

I don't have any issues at shutter speeds faster than 1 second. At longer shutter speeds I just use Long exposure noise reduction. It doesn't just remove hot pixels but also amp glow. Take a look at this thread https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/EOS-R3-Green-cast-in-edges-of-the-frame-in-low-light/m-p/425485#M101753

And this is from my R6 at ISO 3200 and 8 seconds. I didn't have Long exposure noise reduction turned on. Some false positives from the lights, but take a look at the ground.

The next day. Long exposure noise reduction turned on. darktable only found three hot pixels in the whole image. I can't find them. ISO 3200 and 4 seconds.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

azvm — Mon, 30 Oct 2023 13:16:38 GMT

Peter,

Thank you for your explanation. All you cameras are out of warranty, right ? And i notice there big problems.

You use LNR or LENR, but for now i dont want to use it, in your case i will use it, not now, on a brand new camera.

In my case i know is very low, but the camera as 6 months only, and is on canon warranty.

So i return now to canon, or i wait to the near end of the warranty to send it ?

Regard´s

Vitor

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

Peter — Mon, 30 Oct 2023 15:01:52 GMT

I had guarantee in January 2023, but all sensors have the same issue. The R3 in the link above had around 400 at 15 seconds and ISO 6400.

So to deal with it in your case:

Remove them in post in your raw converter
Use a dark frame (LENR)
Shoot at ISO 12800 and above (auto removal with R3, R5, R6, R6 II)
Sensor cleaning method (works best with hot pixels at short shutter speed)
Cool down the sensor

Sony tried to deal with hot pixels with an auto removal feature. I think you have heard about star eaters and Sony.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

ebiggs1 — Mon, 30 Oct 2023 16:39:42 GMT

I also recommend you stop trying to clean the sensor.

You can map out the pixels here is a basic method that I believe works on most Canon cameras

Make sure you have a fully charged battery.
Detach lens and put the camera body cap on.
Go into your menus and find Sensor cleaning.
Select Clean manually.
Let it run for 60 seconds, turn off the camera.
Turn it back on and try it.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

azvm — Mon, 30 Oct 2023 18:08:41 GMT

Never heard, on that from Sony, i was for long term a Canon and Sony shooter, but on the last 5 years, i own Fuji cameras, and did not have any of this issues.

On my oldest canon in 2007 i had the same problem with hot pixels.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

azvm — Mon, 30 Oct 2023 18:10:26 GMT

My clean method - referred before - was that, on camera only and blower to remove dust from sensor.

On this process, i notice the reduce of bright of the hot pixels, only, they did not go away.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

Peter — Mon, 30 Oct 2023 18:55:35 GMT

Sony removed all the stars also, not only hot pixels.

If your Fujifilm doesn't show hot pixels it may have a built-in hot pixel suppression feature, see what I wrote about your R6 II at ISO 12800 and above. With 6D it happens already at ISO 6400, see my raw files here and compare them side by side. Don't use a raw converter that auto removes hot pixels if you want to see the difference (Adobe) https://kameratrollet.se/wp-content/uploads/2022/11/hot-pixels-ISO6400vsISO3200.zip

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

azvm — Mon, 30 Oct 2023 18:59:45 GMT

Peter

On mine it show on low ISO, dont know why and high ISO does not shows, and with the LNR and LNER turned off always.

I will see my test on different ISO with the LNR and LNER turned on, and i will give some feedback.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

azvm — Fri, 17 Nov 2023 13:50:57 GMT

Hello!

I send the camera to Canon, as warranty, and today i have received they thought about this.

- For them this is not Hot Pixels, is sensor dust, and i have to pay 121 Euros - to clean.

Can you believe on this ?

Kind Regard's to All

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

kvbarkley — Fri, 17 Nov 2023 14:29:19 GMT

Cleaning does not get rid of hot pixels. It is a problem in the actual silicon, below any filter or bayer array.

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

azvm — Fri, 17 Nov 2023 14:34:40 GMT

Your right! but Canon support says it is Dust on Sensor and to clean to pay 121 Euros.

Very Bad Service!

Re: Canon EOS R6 MK II - Hot Pixels or Stuck Pixels ?

ebiggs1 — Sat, 18 Nov 2023 15:07:03 GMT

You think it "bad service" because Canon wants to charge you for the sensor cleaning service? What planet do you live on?

What company does any kind of routine maintenance service for free? Canon didn't get the dust on it. You did!