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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 22 Sep 2012 (Saturday) 01:30
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Two 5dmkii and different iso quality

 
John ­ Sheehy
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Sep 22, 2012 16:25 |  #16

JohnB57 wrote in post #15028693 (external link)
You can't see raw files - they have to be converted to view them. That doesn't mean your point about camera settings is incorrect, but it could be worth using another program such as PS to convert the raw files for comparison.

I look at RAW data all the time. It's not pretty in its RAWest state, where it is a B&W image with no gamma, a possible positive black offset, and a checkerboard texture due to different responses in the interleaved color channels. You can still leave it in the RAW colorspace represented by direct translation to sRGB and interpolate away the checkerboard pattern, and even the original data, on a display with a fine enough pixel pitch would display as a smooth B&W image due to the checkerboard pattern being too fine to see.




  
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JohnB57
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Sep 22, 2012 16:32 |  #17

John Sheehy wrote in post #15028925 (external link)
I look at RAW data all the time. It's not pretty in its RAWest state, where it is a B&W image with no gamma, a possible positive black offset, and a checkerboard texture due to different responses in the interleaved color channels. You can still leave it in the RAW colorspace represented by direct translation to sRGB and interpolate away the checkerboard pattern, and even the original data, on a display with a fine enough pixel pitch would display as a smooth B&W image due to the checkerboard pattern being too fine to see.

Super. But there's still no such thing as a "raw image" in the way that you meant, no matter how smart-arse you try to be.




  
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John ­ Sheehy
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Sep 22, 2012 16:40 |  #18

JohnB57 wrote in post #15028947 (external link)
Super. But there's still no such thing as a "raw image" in the way that you meant, no matter how smart-arse you try to be.

No, there is such a thing as a RAW image. it's a B&W image through a colored filter array - that's it. You can display it in B&W, or color in the pixels, and interpolate them into contiguous color planes, all without ever applying white balance, or conversion to sRGB or aRGB.

You're repeating a myth, and you just can't let it go.

Find some other, more true factoid to repeat.




  
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apersson850
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Sep 22, 2012 17:33 as a reply to  @ John Sheehy's post |  #19

Technically you are right, but JohnB57 is still right in that there's no RAW image to see in the concept it was given in this thread.

How much image quality tolerances are there in these cameras? Is this just normal one camera to the other variations?


Anders

  
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moltengold
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Sep 22, 2012 17:41 |  #20

where are the photos ?
its only a black sky in the dark
no lights !!!!
even our eyes cant see in the dark
we will hit the wall without lights


| Canon EOS | and some canon lenses

  
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John ­ Sheehy
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Sep 22, 2012 17:46 |  #21

apersson850 wrote in post #15029097 (external link)
Technically you are right, but JohnB57 is still right in that there's no RAW image to see in the concept it was given in this thread.

Not really. It is especially true in this context that comparing RAW images would show clearly if one camera had more noise for hardware reasons, as they are not affected by metadata.

How much image quality tolerances are there in these cameras? Is this just normal one camera to the other variations?

Except for clearly defective individual cameras, noise is pretty much the same in the same conditions.




  
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Two 5dmkii and different iso quality
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