DPReview.com is closing April 10th - Find out more

Canon 500D stuck/hot pixels fix

Started Apr 24, 2019 | Questions thread
karl mohr Senior Member • Posts: 1,678
Re: Canon 500D stuck/hot pixels fix

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

Unfortunately, long exposure noise reduction, is probably the best way to deal with this.  I know waiting for the 'black frame' is annoying and time consuming.  I also sometimes do 3 and 4 minute exposures.  As you could imagine waiting for the black frame is even more intense.  I have since started working with 2 cameras when I do this - alternating which camera is on the tripod.  (At least you can move the camera when the black frame is exposing).

I was actually surprised when I first noticed this happening on a brand new 70D during 20 and 30 seconds daytime exposures.  I don't think there's anything wrong with your camera - it's just a fact of life.  Maybe going full-frame might help, my friend with a 5D3 doesn't complain about this.

As far as the pixel mapping, I fixed my new-in-box T2i when I first got it.  This is a heavily cropped 'before' image fresh out of the box....

-- hide signature --
 karl mohr's gear list:karl mohr's gear list
Canon 6D Mark II Canon EOS 60D Canon EOS 80D Canon EF 17-40mm f/4.0L USM Canon EF-S 55-250mm f/4-5.6 IS +3 more
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow