whats wrong with my camera ? damaged sensor ?

Hot pixels all cameras have them.

You can either use software to map them out of the image or if you have a Canon (Not sure if this actually works) you can with the lens on go to manual sensor clean leave it for 15 sec power off and i've heard this maps them.

The software i've used before is called PixelFixer.
 
I counted over 200 hot pixels on the last star photo I took.
As I'm not going to using them full size I'm not too bothered.
 
PinkFloyd said:
How would software remove hot pixels on a shot of stars. Not sure I could necessarily tell the difference even :p
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Hot pixels have certain characteristics of being totally blown on one channel, which is why they're red, blue or green. I think Lightroom recognises where there are single pixels blown on one channel, in areas where there isn't much of that channel in the local area e.g. red, blue or green pixels in a sea of black.
 
Ksanti said:
Hot pixels have certain characteristics of being totally blown on one channel, which is why they're red, blue or green. I think Lightroom recognises where there are single pixels blown on one channel, in areas where there isn't much of that channel in the local area e.g. red, blue or green pixels in a sea of black.
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Spot on.
 
PinkFloyd said:
Ah ok, couldn't really make out the colours too well :/

Cheers for the reply :)
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Supposedly, if you get more than 4 of them which aren't clustered, you can get the sensor replaced under warranty. I friend of mine just sent his D90 away again as its got tonnes of hot pixels all over the sensor. Its the second time its done it also on the same body so no idea what they'll do with it this time lol.
 
James J said:
Supposedly, if you get more than 4 of them which aren't clustered, you can get the sensor replaced under warranty. I friend of mine just sent his D90 away again as its got tonnes of hot pixels all over the sensor. Its the second time its done it also on the same body so no idea what they'll do with it this time lol.
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If you're getting them on short exposures then yes, it's a problem. If you're returning for hot pixels during long exposures then you'll never end up keeping your camera. They're not a problem, and if manufacturers made cameras that could do 2 minute exposures with no hot pixels, IQ would be lost elsewhere and price would go up.
 
Sadly this doesn't work for his model but it has worked well for others.

http://wiegaertnerfilms.com/tutorials/how-to-fix-a-hot-or-dead-pixel-canon-7d-5d-550d-600d-60d/

KrisiLuttinen says:
gibbygoo, not sure if you still have the 7D but the technique mentioned here works just it is kind of random.


It took me over 10 tries. I can almost guarantee you the pixel will go away if you
give it more time. I had mine come back on purpose to see if I can do it again and
yes got it mapped out again.


I have video to proove it.

Here is what I suggest:

Put the camera in manual mode.

Set iso to 1600-3200, let it warm up for 2-3min (only first time)

Remove lens and put body cap on.

Turn off the camera.

Remove battery and put it back in.(reset the mapping procedure?)

Power up camera and do the manual cleaning. Leave camera face down on a soft location
and wait 10 sec then exit the clean mode.

See if pixel is there. (to see if pixel still there, put camera in manual, bump iso to 3200 and put cap on while in video mode you should see it on the LCD screent)

Now keep repeating above progressively increasing/randomizing the wait time
before exiting sensor clean mode.

I would suggest a max wait time of 10-15 min if you still see the pixel.


Also, if you run manual clean again after removing(mapping out) a hot pixel it
might pop right back up. 


As for others that do not have a hot pixel, playing with the manual sensor
cleaning option can make one appear, which is why most of you never seen it before.


I made mine come and go away. Every time it was random on how many attempts
it took to map it out again.


Please let me know your results, Im 100% if you have the patience it will map out.
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