07-02-2020 06:04 PM
Have a high mileage 5D MKIV and just noticed patches of red dots when I zoom in on raw photos in Photo Pro software. Just checked the previous shoots and those are fine, so it's definitely a new issue.
I've tried cleaning the sensor manually without success. Any ideas? or is this a trip to Canon service?
07-03-2020 06:49 AM
What is your exposure information for the shots showing red dots, ISO in particular? These red pixels from "hot" pixels are likely at high ISO and/or long exposure settings. Maybe a camera setting was accidentally changed causing it to use a higher ISO creating more color noise.
07-03-2020 06:59 AM
07-03-2020 09:59 AM
You are welcome Phil and with a sudden and large increase in hot pixels it sounds like it is time for Canon service. If the camera was stored/used in very hot conditions that will also cause an increase in sensor noise but it would have to be unusually hot to cause a sensor to suddenly start showing more noise.
Google hot and stuck pixels to see more about this issue.
07-03-2020 10:36 AM
Doesn't your raw converter have a hot/dead pixel remover?
07-03-2020 01:00 PM
07-03-2020 07:50 PM
07-04-2020 01:14 AM
07-04-2020 07:08 AM
Chasing hot/dead/stuck pixels can sometimes be a pointless excercise because they can show up in different positions with each shot.
My old 50D suffered with quite a few and I tried the supposed "manual remapping procedure" which worked for me at the time (but it may have been a coincidence). Here's how it's done:
Make sure you have a fully charged battery.
Remove lens & fit body cap.
Activate "manual sensor clean" in the camera menu.
Leave for 30secs to 1 minute.
Turn off camera at main switch.
That's it, dodgy pixels should now be gone.
Some people say that this works, others say it's a myth but it seemed to work for me some time ago and you have nothing to lose. Apparently it only works for still photography and does nothing for pixel problems with video.
07-04-2020 08:22 AM
05/31/2023: New firmware updates are available.
EOS R6 Mark II - Version 1.1.2
05/18/2023: New firmware updates are available.
EOS Rebel T100 - Version 1.1.0
EOS 5D Mark IV - Version 1.4.0
EOS 6D Mark II - Version 1.2.0
PowerShot Elph 360HS - Version 220.127.116.11
PowerShot SX420 IS - Version 18.104.22.168
PowerShot 620 HS - Version 22.214.171.124
PowerShot SX720 HS - Version 126.96.36.199
PowerShot G1X Mark III - Version 188.8.131.52
PowerShot G7X Mark II - Version 184.108.40.206
PowerShot G9X Mark II - Version 220.127.116.11
04/20/2023: New firmware version 1.4.1 is available for EOS R3
03/30/2023: New firmware updates are available.
EOS 1DX Mark III- Version 1.7.1
Speedlite EL-1 - Version 1.0.2
03/30/2023: Product Advisory for EF50 F1.2 L USM
03/30/2023: Product Advisory for EOS R10
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM
Canon U.S.A Inc. All Rights Reserved. Reproduction in whole or part without permission is prohibited.