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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 05 Jul 2012 (Thursday) 04:16
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Just want to be sure that my 5dmkii is ok

 
rapurimanka
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Location: Moscow
     
Jul 05, 2012 04:16 |  #1

Hi,

Sometimes i take pictures at hi iso, 6400-12800, ye its a mess of noise, but it doesn't bother me. I only worried about one thing, purple dot at the bottom of photo. Take a look:

https://dl.dropbox.com​/u/5020311/IMG_0118.jp​g (external link)

This whole black bag is black, but at the bottom its purple O_o

You can see better on uncleaned raw:

https://dl.dropbox.com​/u/5020311/IMG_5901.jp​g (external link)

so, my question is, do you all have a lot of noise at the bottom of photo on hi iso? Or my sensor is bad?


6D | Canon 85 1.8 | Canon 24-105 4 | Lightroom 4
https://www.flickr.com​/photos/27393138@N08/ (external link)

  
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pxchoi
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Jul 05, 2012 05:54 |  #2

It's not that it's happening just at the bottom of the frame - per say. It's just most obvious in areas that are underexposed or in this case, the black bag.

I think at ISO 12800, this is to be expected. There are ways to compensate and reduce the appearance of noise. One way is to push the histogram to the right - Overexpose the shot slightly but without losing detail in the highlights. Then, bringing it back down in post processing. Also, touching up your photo with noise reduction will go along ways.


Patrick Choi
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EOS 7D | 580EX II | 10-22mm f3.5-f4.5 | 17-55mm f/2.8 IS |70-200mm f/2.8L IS II
For Sale: 17-55mm f/2.8 IS | 10-22mm f3.5-f4.5

  
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Midaso
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Jul 05, 2012 06:14 |  #3

I think this is perfectly normal when shooting at ISO 12800. Like the poster above said, it's just more obvious in black areas. So no worries, your camera is fine! Go out and have fun with it ;)




  
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rapurimanka
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Jul 05, 2012 06:30 |  #4

Well, this is 6400 and the same story for bottom part:
https://www.dropbox.co​m …lj1yvvotaq6t/IM​G_5248.jpg (external link)

It has some purple in it.


6D | Canon 85 1.8 | Canon 24-105 4 | Lightroom 4
https://www.flickr.com​/photos/27393138@N08/ (external link)

  
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pstyle1
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Jul 05, 2012 07:35 |  #5

Your camera is broked. Only solution is a 5D Mk III.

:p


5D MkIII x2 + a lot of L's.
www.facebook.com/Peyma​nRazaviPhotography (external link)

  
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pxchoi
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Jul 05, 2012 16:00 |  #6

rapurimanka wrote in post #14672824 (external link)
Well, this is 6400 and the same story for bottom part:
https://www.dropbox.co​m …lj1yvvotaq6t/IM​G_5248.jpg (external link)

It has some purple in it.

It's normal - poor lighting, it's underexposed, and lots of black. The ISO performance is great on the 5D Mark II but it's not going to perform miracles. In the EXIF data it says you used a 50mm f1.4. If you shot at f1.4, you probably could have shot at around 1/60 to 1/100 and easily been able to exposure compensate by +1/2 or +2/3.

This might help you to understand noise a little bit. http://www.cambridgein​colour.com/tutorials/i​mage-noise-2.htm (external link)


Patrick Choi
Portfolio (external link) | Flickr (external link) | Facebook (external link)
EOS 7D | 580EX II | 10-22mm f3.5-f4.5 | 17-55mm f/2.8 IS |70-200mm f/2.8L IS II
For Sale: 17-55mm f/2.8 IS | 10-22mm f3.5-f4.5

  
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Just want to be sure that my 5dmkii is ok
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