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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 12 Dec 2012 (Wednesday) 18:54
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Red colors and EOS dslr's

 
jt354
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Location: Michigan
     
Dec 12, 2012 18:54 |  #1

Does anyone else feel that Canon CMOS (and probably CCD) sensors poorly represent long wavelengths (Red, orange, etc.)? Many of my pictures have blown out red channels that only turn "pink" when Recovery tools are used in post-process. Meanwhile, blue and green channels are fine, so it's not like the entire image is oversaturated. Weird.


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LARAB
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Dec 12, 2012 19:38 |  #2

Glad you asked, I shot bike races last weekend and seem to be having some issues with reds. The photos below are extreme examples, but it was consistent all weekend. I never had any issues until I went from a T1i to a 7d, and it seems to be confined to primes, not so much with zooms. I think I desaturated the reds in the second image, gonna go check... Yep, saturation -7 and luminance -22 in Lightroom.

IMAGE: http://farm9.staticflickr.com/8481/8268738086_1f9068f738_z.jpg
IMAGE LINK: http://www.flickr.com/​photos/obra2025/826873​8086/  (external link) BMN_121209_5400 (external link) by obra2025 (external link), on Flickr

IMAGE: http://farm9.staticflickr.com/8220/8267667865_ee5fe126b7_z.jpg
IMAGE LINK: http://www.flickr.com/​photos/obra2025/826766​7865/  (external link)
BMN_121208_5156 (external link) by obra2025 (external link), on Flickr



  
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sally_tomato
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Dec 12, 2012 21:24 |  #3

i have noticed same. although mostly with bright scenes as the first photo above.

try moving this question to raw/post processing section on the forum.




  
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ETS
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Dec 12, 2012 21:35 as a reply to  @ sally_tomato's post |  #4

I think red has always been a difficult color to photograph. One thing you can do to avoid the problem is to use your RGB histogram instead of the brightness histogram when photographing a strong red subject. If it shows your red channel being clipped then slightly under expose the shot to compensate.


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Red colors and EOS dslr's
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
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