Re: EOS Ra - Stuck/Hot Pixels with long exposures...
Hi all,
Looking to this treat not sure if our case is the same or we have a real problem.
Recently our Canon Ra showed an anormaly quantity of mostly white pixels. We usually saw several pixel 'stuck' and we was ok with that. No surprise as we also have a Canon R that was used also for astrophotography for more than a year.
We have the Canon Ra since Dic 2020 and used it constantly (weather letting) on ISO 1600-3200 and exposure between 3-8 min long without problem and nice perfomance.
On May 28th we notice a high quantity of white pixels in the begining of the sesion that dismiss over the night (6 hours sesion), it was less but still a lot of them, but two days later in other sesion the increment was so noteciable that we stoped and decide to send the camera to revision. After two months we received yesterday the camera back with a paper saying "PIT STOP, SENSOR CLEANING, VERIFICATION, CALIBRATION (AE-AF-W-B-COLOR MATRIX), TURN OFF HOT PIXELS. UPDATE FIRMWARE 1.8.0, TEST, NR SHOTS TESTED 13060".
We did a test of 5 dark frames of 8 min ISO 2500 for found the same 'white shower' pixels. Frustation. We did other test with ISO 1600 8min and showed less white pixels, but still are a lot of them in all the frame.
After read all the posts of this treat, we try to 'reset' the pixel with the sensor cleaning suggestion but seems no change the situation.
Attached this pics for you have better idea what we are getting. Zoomed at 300%
Frame_A0982_January is a dark frame tooked in January that barely showed some white and stuck pixels.
Frame_ISO2500_480s_14009 before sensor cleaning
Frame_ISO2500_480s_14011 after sensor cleaning
Frame_ISO1600_480s_14020 change ISO 1600
Squid Nebula SH2-129 sessions
SH2-129_ISO200_480s_April24th_05478 Showed the usual stuck pixels
SH2-129_ISO2000_360s_May28th_06165 Showed the stuck pixels and white in abundance
SH2-129_ISO2500_480s_June1st_0001 Showed more white pixels
If you need the raw image .CR3 I can upload them and give you the link for any test. We will apreciate any suggestion and light in this issue.
N Camerin






