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Canon 500D stuck/hot pixels fix

Started Apr 24, 2019 | Questions thread
karl mohr Senior Member • Posts: 1,678
you're in the right spot, but...

bclaff wrote:

Some cameras will map out bad pixels if you perform one or two consecutive sensor cleanings; so that's worth a try.
If you haven't done it here's the page from the manual:

If you're curious to document your bad pixels, particularly before/after trying this technique, contact me by email or Private Message (PM).
I have a statistical technique to objectively report bad pixels.

FWIW, sensors do "age"; one culprit is cosmic rays, they are rare but do damage pixels.

The actual mapping function actually is very close to where you are, but instead of 'clean now' you should choose the menu choice just below that one 'clean manually'. This is the function that flips up the mirror and opens the shutter for an actual physical cleaning of the sensor with a moistened swab or some other method. Leave in this mode for 30 seconds to a minute. This will probably only map out a blatantly bad pixel - the long exposure 'spots' you are seeing probably won't be affected.

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