[moky]

I recently shot some long exposure shots last night and only noticed that my camera might have some dead pixels or stuck pixels. I have a 5d mk2, have owned it since 2009. no idea how many actuations have been done

what i think are the dead pixels, are coloured red green blue and white, and they appear in the same position through out numerous shots. from what i can see, the only occur in long exposure photos that are predominantly dark.

is this something easy to fix or should i send the cam to canon canada?
any help would be greatly appreciated!

[-EuroRSN-]

These are automatically eliminated if youre using Lightroom and shooting RAW. You may have to reinstall your current firmware to erase the dead pixels completely.

[Senna4ever]

How long were your exposures? You will get them with long exposures, it's a fact of life with digital cameras.

[moky]

I'll try to reinstall my firmware later today to try to remap the sensor and pixels.

-Senna: the exposures were relatively short, 30secs f9 iso400, but when i tried it last night with my lens cap on, 30sec, f4, iso100 they are still there.

i only had these dead pixels from the other night though, i've done 5 minute or more exposures before but they never showed up before.

**my long exposure noise reduction is turned off tho (for faster write times)

[Senna4ever]

**my long exposure noise reduction is turned off tho (for faster write times)
This may be part of the problem.

Also, was the software that you used to open the RAW files the exact same? Are the settings within the software the same? Ambient temperature? Did you take a lot of consecutive long exposures that may have heated your sensor? There are so many variables...

What you have are hot pixels, not dead pixels, btw.

[LiquidTurbo]

No big deal to fix in post.
Posted via RS Mobile

[moky]

even the first of the bunch, the hot pixels were showing up.
in canon's DPP when i just "view" the cr2 file it shows up, but when i import to ACR, they are barely visible unless i start pixel peeping. same colour temp for all of the photos though

[77civic1200]

Read this: Long Exposure Noise Reduction | Albert de Bruijn Photography (http://albertdebruijn.com/home/archives/59)

Leave the long exposure noise compensation on if the hot pixels bother you