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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 15 Sep 2014 (Monday) 01:34
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why is Canon considered to have bad dynamic range?

 
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Sep 15, 2014 01:34 |  #1
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Not saying it does or that it does not have bad dynamic range. When I take pictures of people and the sky is behind them (not even the sun just the regular sky) the faces are usually pretty dark and that's a bit discouraging. But other times I'll take say a flash picture with the background pitch black, bring it in lightroom and recover tons of information in the shadows.




  
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Mathmans
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Sep 15, 2014 02:19 |  #2

If you expose for the sky the faces will always be dark. Or you can expose for the faces and the sky will be overexposed.
The difference between cameras is how much details can you recover from the shadows.


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Sep 15, 2014 02:35 |  #3

Canon has for the past 10 years or so led the way in high quality High ISO low noise.

In the past few years Sony has produced sensors that get very good low ISO noise, and Nikon has "inherited" these qualities, so that the Nikon/Sony bodies have gotten a good reputation for underexposing shots at a low ISO and then bumping the exposure in post-processing, similar to what was done in film days.

It's a toss-up, you make it in capturing a photo and then processing it!


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Gregg.Siam
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Sep 15, 2014 02:44 |  #4

A top end Canon has 12 stops of DR (14 with magic lantern) and a top end Nikon has 14. I would hardly call that bad DR considering a 35mm film camera has about 6-7 depending on film used.


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Sep 15, 2014 02:47 |  #5

Might have nothing to do with the DR, I'm almost sure it come from the metering system and how you use it in different cases.
Which camera you have and which metering set up are you using ?


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Sep 15, 2014 03:10 |  #6

Gregg.Siam wrote in post #17154901 (external link)
A top end Canon has 12 stops of DR (14 with magic lantern) and a top end Nikon has 14. I would hardly call that bad DR considering a 35mm film camera has about 6-7 depending on film used.

Exactly - it's not that Canon is bad, just that at the moment, others are better.

In one particular ISO/histogram range.

Which doesn't matter to many of us in the Real World.

Canon sensors probably have better DR at the top of the histogram (where - personally - I want the latitude), but that never seems to matter in these discussions...




  
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Sep 15, 2014 03:18 |  #7

Dynamic range is poor at the present moment, but that's general, not just Canon. However this can only improve with time. I disagree with the fantastic DR claims, I simply don't see 12, let alone 14 stops in my own work.


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Sep 15, 2014 03:41 |  #8

At the sensor level it's not like there's a lot of data available to the bottom five or six stops of the DR anyway. Given that the sensor is linear, the first five stops covers the range 0 to 32, of a total of 16384 levels. When you look at where the mid tone is actually situated, at -3 stops from saturation. That gives a mid tone value of 2048. I'm not sure what level of noise is inherent in either the Sony or Canon sensors, but even if it means that you have a difference of two stops, say bit 5 for Sony and bit 7 for Canon, that actually only amounts to a total of 96 extra levels that you can record at the sensor.

Personally I would rather have my exposure sitting at the righthand side of the histogram. That last stop of light gets a whole 8092 levels to describe it. So there is far more information in the higher bit values of a linear sensor. The real problem is that with a digital sensor you have a hard upper limit, there is no signal roll off, like you get with film, or even at the other end of the digital range.

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amfoto1
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Sep 15, 2014 09:57 |  #9

Keith R wrote in post #17154925 (external link)
Exactly - it's not that Canon is bad, just that at the moment, others are better.

In one particular ISO/histogram range.

Which doesn't matter to many of us in the Real World.

Canon sensors probably have better DR at the top of the histogram (where - personally - I want the latitude), but that never seems to matter in these discussions...

This is correct.

It's not that Canon is "bad"... It's that some other manufacturers have tweaked their sensors, processors and software algorithms to be up to approx. 2 stops bit better at recovering underexposed shadow detail from... at their cameras' lowest ISOs. In all but the most extreme situations you won't see much difference, so long as you use accurate exposures with the Canon.

As noted, at higher ISOs the difference disappears and... And out in the real world this is far more likely where you would want and need any advantage possible.


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Sep 15, 2014 10:02 |  #10

http://www.youtube.com​/watch?v=Jva08HY6uLE (external link)

This is a fun video to watch



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mclaren777
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Sep 15, 2014 10:08 |  #11

Canon is still using an antiquated manufacturing process (0.50 µm) while Sony is using a much newer, more advanced process (0.18 µm).

It's a real shame. (external link)

5D3

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D800E
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A simple comparison of sensor technology: Nikon vs. Canon (external link)
A technical comparison of sensor technology: Exposure Latitude (external link)

  
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rick_reno
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Sep 15, 2014 10:14 |  #12

^ posting samples is cheating.




  
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ryanshoots
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Sep 15, 2014 10:17 |  #13

Gregg.Siam wrote in post #17154901 (external link)
A top end Canon has 12 stops of DR (14 with magic lantern) and a top end Nikon has 14. I would hardly call that bad DR considering a 35mm film camera has about 6-7 depending on film used.

Film looks like it has more because it will tolerate over exposure much better than digital. I think we need even more DR in digital to get what those 6-7 in film gave us. I'd shoot film, but for the cost and hassle. Definitely prefer the look to digital.




  
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mclaren777
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Sep 15, 2014 10:21 |  #14

People need to be informed. Canon is making bad decision after bad decision (look at today's 7D2 announcement) and the only glimmer of hope is that they're probably using a Sony sensor in the G7 X.

Hopefully it's the beginning of a long Canon-Sony partnership which would give the 5D4 a sensor that's at least as good as the basic A7.

Image Source (external link)

5D3

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D800
IMAGE NOT FOUND
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A simple comparison of sensor technology: Nikon vs. Canon (external link)
A technical comparison of sensor technology: Exposure Latitude (external link)

  
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pkim1230
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Sep 15, 2014 10:24 |  #15

Sigh........canon



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