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Thread started 14 Feb 2010 (Sunday) 21:09
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Canon 1D4 ISO 400 Noise

 
MikeV99
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Feb 14, 2010 21:09 |  #1

The original raw files for the images are available as a zip (external link).

I shot this using

Camera: Canon EOS-1D Mark IV
Exposure: 0.001 sec (1/2000)
Aperture: f/10.0
Focal Length: 280 mm
ISO Speed: 400
Exposure Bias: -1 EV

IMAGE: http://farm5.static.flickr.com/4008/4358195148_f48dd2f120_b.jpg


Although it does not have a lot of noise, it has more than I expected at ISO 400 with the 1D4. Am I expecting too much from the camera?

I ran it through Define and did some basic LR adjustments. It looks better here (at least I think so).


IMAGE: http://farm3.static.flickr.com/2726/4358239634_4e7c9dbc68_b.jpg

I guess I should apply some more sharpening to the upper wing tips?

Any thoughts?

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Sdiver2489
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Feb 14, 2010 21:14 |  #2

MikeV99 wrote in post #9610288 (external link)
Any thoughts?

It's underexposed which accentuates the noise and makes it appear more ISO800 like...


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Brett
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Feb 14, 2010 21:34 |  #3

MikeV99 wrote in post #9610288 (external link)
I guess I should apply some more sharpening to the upper wing tips?

Any thoughts?

It looks like the whole image already has sharpening artifacts, and the upper wing tips are blurred by motion, so sharpening them doesn't help at all.

Agreed with Sdiver, the image is under-exposed, making it noisier when brought up in post.



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Stickman
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Feb 15, 2010 00:33 as a reply to  @ Brett's post |  #4

Its an underexposed image, trying to save it is always going to bring out more noise.


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thatkatmat
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Feb 15, 2010 00:47 |  #5

Has anyone noticed the original is underexposed which, when pushed in PP will give you more noise? Wait...never-mind...:p:D


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Brett
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Feb 15, 2010 00:51 |  #6

thatkatmat wrote in post #9611340 (external link)
Has anyone noticed the original is underexposed which, when pushed in PP will give you more noise? Wait...never-mind...:p:D

Wasn't me.  :p

:lol:



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Omaru
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Feb 15, 2010 01:09 |  #7

First of all the image is underexposed. So obviously when pushing exposure on PP it would increase noise.


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Fangs404
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Feb 15, 2010 02:37 |  #8

The only thing I see is that the image is underexposed. Note that if you try to fix this in post, it'll increase noise.


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hpulley
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Feb 15, 2010 05:46 |  #9

-1EV is your problem. For a white bird you want +1EV.

f/10 should have been enough DOF to get the wing tips in, more than enough in fact. Try f/8 with 1/8000 instead of f/10 1/1000.

More focal length will require less cropping. Cropping makes the noise look worse than it is, to go along with the underexposure.


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The ­ Moose
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Feb 15, 2010 06:53 |  #10

It's what happens when you underexpose. It doesn't matter that it's a 1D Mark IV or that it's ISO 400. It would happen at ISO 100, too.




  
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Yeoer
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Feb 15, 2010 07:01 |  #11

Nice dust spot!


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MikeV99
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Feb 15, 2010 08:12 |  #12

Thanks all for the helpful info. I was on a moving boat and had to move fast. I did see that the histogram was a bit to the left with a horizontal line toward the right but the gull was gone. I did not realize that underexposure would have that much impact on noise, better luck next time. Happy to see it was operator error rather than camera problems (what dust spot, I thought it was a floater).

What can I do to reduce the sharpening artifacts?

Thanks.


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Erik_L
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Feb 15, 2010 08:20 |  #13

I guess you could run some NR on it again, after sharpening....

I now have a tendency to always expose at least 1/3 "to the right" - camera has a tendancy to slightly underexpose in Av


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ed ­ rader
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Feb 15, 2010 08:24 |  #14

MikeV99 wrote in post #9610288 (external link)
The original raw files for the images are available as a zip (external link).

I shot this using

Camera: Canon EOS-1D Mark IV
Exposure: 0.001 sec (1/2000)
Aperture: f/10.0
Focal Length: 280 mm
ISO Speed: 400
Exposure Bias: -1 EV



Although it does not have a lot of noise, it has more than I expected at ISO 400 with the 1D4. Am I expecting too much from the camera?

I ran it through Define and did some basic LR adjustments. It looks better here (at least I think so).



I guess I should apply some more sharpening to the upper wing tips?

Any thoughts?

yeah because you aren't doing your job. underexposure will always yield more noise.

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Canon 1D4 ISO 400 Noise
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