Sean,
YES and EXACTLY!!! This precisiely what I am experiencing. In C1v4 i get 1,000's of white pixels. {for the rest of you who want some details - 1ds Mark III, ISO 100 - 200, fast exposure times like 1/25 and/or lonmg exposures to 10 seconds, and basically any exposures in between, I am getting tons of noise].
When I process in DPP, the noise is white, red, blue, green. If proccessed in PSCS3, the noise is white, and mostly gone. But it is still there.
I sent my camera in to CPS. That was a new fiasco and I am furious with Canon at this point. Firstly, I was told my CPS membership had expired thus I was no longer a CPS member. After a six year membership, I was no longer a member. News Flash - CPS membership now expires every year. If you do not seek to renew your membership every year, yours will expire too. Feel free to write Canon and tell them that this is lame. But back to my Mark III....
I sent the Mark III in to Canon and they had it for three days, returning it free of any problems.
I did a photo shoot with it yesterday, asssured from Canon that all was well. To my loving surprise, the images are now NOISY AS EVER!!!!
Today, I ran every test I could in house on my camera and tried every variable possible literally. Nothing, corect this noise.
Many are saying this sounds like a bad sensor problem. Then why in the ***** did Canon not repair this last week when they had my Camera? I havd to cancel a week's worth of work and now I have to do it again. I can't get a loaner from CPS because "I am not considered a member" until my membership goes thru their normal 4-6 week new member check.
Canon - this is bad, bad, bad business. Shame on you!!!
This sounds similar to the problem I had. In my case any exposures of around a second or longer exhibited hundreds of hot pixels. In Capture One they appeared white, in DPP they showed as red, green and blue spots and in ACR the program automatically corrected them (even with noise reduction off) so they were not visible. The ISO setting did not affect the hot pixels, but they were dramatically reduced with shorter shutter speeds.
After going around and around with Canon service I had to send it in and have the sensor replaced.
So it sounds like you may have a defective sensor.
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