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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 30 Jan 2011 (Sunday) 14:31
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T2I ISO Noise

 
Mikey ­ Proximo
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Jan 30, 2011 14:31 |  #1

Hi all,

I own a Rebel T2i which I purchased less then a month ago. Whenever I increase the ISO
in the video mode to 3200 or 6400. A blue dot appears in the upper right hand corner of
the image. It is not the display screen because the blue dot also appears in the raw video files when I upload them.

Is this a normal problem that I can fix on my own or should I take my camera to my local
cannon center for repairs?

Look forward to your feedback.

Mike




  
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Mikey ­ Proximo
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Jan 30, 2011 14:39 |  #2

Just to note. I have done 2 low light test and each time the blue dot has appeared exactly in the same spot.




  
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anothernewb
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Feb 01, 2011 11:29 |  #3

sounds like it might be a hot/stuck pixel. some people have had luck with putting the camera into a manual cleaning mode with the body cap on and leaving it run for a few minutes, then removing the battery for a time and doing a complete reset.

do a search for methods to clear hot/stuck pixels. One of the methods might work for you.


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Mikey ­ Proximo
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Feb 15, 2011 02:08 as a reply to  @ anothernewb's post |  #4

Thank you I will take a look. I sent my t2i in for repairs. Best Buy replaced it with a brand new t2i today. (02/14/11) After shooting with it out of the box for less then 10 minutes I noticed another hot pixel. Could it have been that I already burnt a hole in the sensor? I had the 18-55 is lens open to about f4.0 shutter 1/30 ISO 6400. I didn't put the camera directly at the street light but immediately after putting it on these settings the Hot Pixel appeared again. I did another several test with the lens cap on with iso settings at 1600 and above. The hot pixel appeared each time. Let me remind you that this a brand new t2i I have had less then a day. Any ideas what would of cause it this time?




  
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Saint728
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Feb 15, 2011 02:18 |  #5

One hot pixel is nothing compared to 18 million pixels you have on your sensor. I wouldn't worry about it if I were you. BTW, does the hot pixel show up under normal shooting conditions or are you just trying to take a video with no or very little light? I would suggest you take the lens cap off and shoot with some light, you won't see any hot pixels.

Take Care,
Cheers, Patrick


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Mikey ­ Proximo
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Feb 15, 2011 02:47 |  #6

It only appears under low-light conditions. Yes it appears in both the video and pictures shot
in low light.

I have done the reset test twice and it has not removed the hot pixel.

I bought the t2i to shoot to in low light to copy the look like the Michael Mann film Collateral. From the videos I have watched on youtube of night footage shot with the t2i in the video mode. I have not seen any hot pixels in their footage. Is the secret just turning up the blacks in post? Any suggestions on how to achieve this exposure? What would be the proper way to achieve that look with out getting any hot pixels?




  
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magwai
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Feb 15, 2011 02:50 |  #7

I think you did the right thing sending it back. It may be easy to fix but why settle for a camera with a flaw? It would bug me until I had it fixed.




  
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T2I ISO Noise
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
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