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Thread started 24 Aug 2010 (Tuesday) 17:13
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7D - Noise? Normal

 
Cosha
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Aug 24, 2010 17:13 |  #1

This Noise normal on a 7D...?

I would expect iso to be well over 800 before i would see any noise like this:

100% Crop from RAW - Just converted no sharpening etc..

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Canon 7D
70-200mm F/4 L USM
1/5000
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ISO 400
Shot @ 200mm


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themadman
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Aug 24, 2010 17:14 |  #2

For a 100% crop, no noise reduction, at iso400? Seems perfectly normal.


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JoYork
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Aug 24, 2010 17:16 |  #3

Which Raw converter are you using?

I've noticed noise in deep blue skies on my 5dc if I use Lightroom 3, but it's not there when I use Canon's DPP software.


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malla1962
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Aug 24, 2010 17:20 as a reply to  @ JoYork's post |  #4

Did you push the exposure in this?


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shedberg
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Aug 24, 2010 17:24 |  #5

JoYork wrote in post #10780904 (external link)
Which Raw converter are you using?

I've noticed noise in deep blue skies on my 5dc if I use Lightroom 3, but it's not there when I use Canon's DPP software.

Same here, but on my 7D and in ACR. DPP produces the cleanest images for me.


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Zerimar
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Aug 24, 2010 17:27 |  #6

That's strange, it looks like you boosted the fill light on the bird and might have gotten this..

whats the non cropped picture look like?


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Abozakaria2009
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Aug 24, 2010 19:12 |  #7

malla1962 wrote in post #10780927 (external link)
Did you push the exposure in this?

if you push up exposure this is normal .. else not normal




  
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yogestee
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Aug 24, 2010 20:27 as a reply to  @ Abozakaria2009's post |  #8

Pixel peeping can lead to impotence, depression then eventually insanity..

Don't do it..


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bohdank
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Aug 24, 2010 20:45 |  #9

That explains a lot :-)


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Aug 24, 2010 20:53 as a reply to  @ bohdank's post |  #10

Thank goodness I had my children before I bought a DSLR. Now where did I misplace my Prozac?

Similar shot at ISO 500, 100%, neutral picture style, no sharpening, no noise reduction, no HTP or ALO.

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phreeky
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Aug 24, 2010 21:01 |  #11

The pixels are tiny - over 5000 of them across the image - so 100% crops are a very extreme crop, some noise at ISO400 (even lower) isn't abnormal IMO.

Also what about the other settings in your camera like highlight tone priority and the sharpness setting in your picture parameters?




  
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Cosha
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Aug 25, 2010 02:06 as a reply to  @ phreeky's post |  #12

Thanks everyone!

I use DNG converter for my Raw files, then everything goes into bridge then photoshop!

The reason i ask is i just went through some pictures i took with my 450D at iso 800 or higher and i never got half as much noise as this!

I never pushed any exposure just come out as shot, just resized for web...

Ill run it through the canon software see if i get anything different

Excuse the rubbish picture BTW, i was out trying to get some BIF shots - turns out its alot harden then i thought to get spot on focus :D


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apersson850
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Aug 25, 2010 03:25 as a reply to  @ Cosha's post |  #13

The 7D is pretty well known for generating quite a lot of noise at low ISO. The irregular amplification of different columns in the sensor is one reason for this. Canon's DPP software is aware of this difference, and at least tries to combat it. Not all other software vendors do.

When shooting jpeg, I usually set the camera's noise reduction to "low". That combats color noise, but not monochrome noise. At least to me, the result is useful directly from the camera. But I'm no pixel peeper either. I think the whole picture is more interesting than a section viewed at 100% magnification.


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Aug 25, 2010 08:46 |  #14

Might want to read through this thread on this very topic..especially John Sheehy's comments.
http://forums.dpreview​.com …rum=1019&messag​e=36108067 (external link)


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TGrundvig
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Aug 25, 2010 08:53 |  #15

yogestee wrote in post #10781849 (external link)
Pixel peeping can lead to impotence, depression then eventually insanity..

Don't do it..

Exactly! I was horrible about doing that until I was told to stop. At most, 50% crop. But, I've gotten to a point where if I can't get close enough to the subject.....I just don't shoot it. Otherwise, as stated by yogestee, it will drive you insane.

With that said, I think the shot is slightly underexposed. It was a little more over exposed you would see less noise in the image. Even at 100 ISO, if it is underexposed it will show more noise.

I also agree with the RAW converter comments above. Not all of them are equal.


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