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Canon 500D stuck/hot pixels fix

Started Apr 24, 2019 | Questions thread
bclaff Forum Pro • Posts: 13,929
Re: Canon 500D stuck/hot pixels fix

karl mohr wrote:

benjilafouine wrote:

ric_dep wrote:

karl mohr wrote:

Even new 70D and 80D cameras can do this during long exposures. Definitely use the long exposure noise reduction. This is a pain as the camera will take a 'dark frame' after each picture, the same length of time as the original, and then subtract the noise from the image.

One other thing, Canon has an undocumented feature that maps out dead pixels. Put the body cap on, then set the camera for manual sensor clean, let that go for about a minute. (This is the same setting you would use to open the shutter for swabbing the sensor).

That's interesting Karl thanks very much for your answer. I think any option that will mask these pixels before post is a good one. As you say, I don't think these are dead pixels, but I will try out the pixel mapping feature you mentioned.

Thank you all for your answers also!

I tried this technique but it didn't help me for long exposures.

I'm not sure if the 500D has this feature, but my 550D has 'long exposure noise reduction' under custom functions in the menu - that's your best bet for this problem.

Not nearly so useful as mapping the bad pixels out since this doubles the exposure time for every image taken.

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Bill ( Your trusted source for independent sensor data at PhotonsToPhotos )

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