hot pixels

Brendan Mulachy

Brendan Mulachy

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dave
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im more into my long exposure photography at the moment,i find it relaxing in as much as i just like the fact i have to slow down, put the camera on a tripod,take more care with my composition, take a few shots of differing lengths yada yada yada, anyway one downside of this is ive noticed my shots coming back with some hot pixels, i understand its due to the fact im doing a long exposure shot but is it a sign that my sensor on my camera (its a 5dmk iii so its 9-12 years old and the shutter count is not particularly high) is on its way out and is there anything i can do about it. its not life or death it just means i can cut down on my editing time having to get rid of them
 
It has been a while but IIRC with Canon bodies (and AFAIK all such dSLRs......and mirror less.....though I have not tried a long exposure for decades) you can set it to take a 'black' frame. This is shot immediately after saying the 30s exposure it will take another frame for 30s with the shutter closed. The in camera software then processes it to remove the hot noise.

IIRC one way to check for or dead pixels was to take a shot with a light tight lens cap on using the Manual Sensor Cleaning process.
 
Last edited:
Box Brownie said:
It has been a while but IIRC with Canon bodies (and AFAIK all such dSLRs......and mirror less.....though I have not tried a long exposure for decades) you can set it to take a 'black' frame. This is shot immediately after saying the 30s exposure it will take another frame for 30s with the shutter closed. The in camera software then processes it to remove the hot noise.

IIRC one way to check for or dead pixels was to take a shot with a light tight lens cap on using the Manual Sensor Cleaning process.
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il have a look at this cheers
 
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