Well – when I took my Canon 50D out of the box a week or so back, I found after a bit of pixel peeping on some images, that I had two hot pixels on the sensor. I was immediately disappointed and thought I'd be without my new camera for a week or more while I returned it and waited for the dealer I got it from to send it back.
If they had been more out of the way – well – one was bottom right, and not too much to worry about; the other was about midway up, about a third of the way across the sensor. I'll also post 100% crops of the .jpg images that show the hot pixels. What seems a bit odd to me, the RAW files didn't show the problems, just in the jpegs… curious. Here are the two crops one blue pixel on the left side of the sensor, and a brighter pixel in the lower right corner (the pixels are centered in both crops below):
I figured I'd do a quick search to see what other folks had experienced when sending cameras back and soon Googled "canon 40D hot pixel"… one of the first pages talked about a fix that had worked for this person, and supposedly others. A quick read had me thinking it was well worth a shot – and whaddaya know, it worked for me as well! I'd post images "after" but it seems ridiculous to post black squares… <chuckle>.
Here is the fix, I'm not going to venture any theories as to why it worked, but one page I read said they thought it "re-calibrated the sensor"… To be honest, I don't care – my sensor seems to now be working a-okay!.
Hot Pixel Fix for the Canon 40D which worked on my 50D:
- Remove the lens and put the body cap in place on the camera
- Put the camera in to "manual sensor cleaning mode". It is the same for both the 40D and 50D – Press the "Menu" button, then select the middle "yellow wrench" tab, then "Sensor Cleaning" then "Clean Manually". You will hear the click of the mirror coming up (so you *could* be using a swab on the sensor – but don't do that – leave the body cap in place).
- Leave the camera in this mode for 30-60 seconds, I kept it this way for closer to 60 seconds.
- Power off the camera off – you should hear another click as the mirror drops down into place
That was it. Test the camera and see if the dead pixels are gone – they were for me.
Thanks for reading!