Noise
Nov 7, 2016 15:23:04 #
cptiger
Loc: Englewood, FL
I'm kinda dumbfounded. Using 5DIII, 16-35L, Singh-ray warming polarizer, shooting aperture priority f8 to f11, ISO 200 and I'm getting a lot of sky noise. If it's visible in the sky, it must be throughout the photo. Doing nothing unusual processing in Lightroom and Photoshop CC. What am I missing or doing wrong? All thoughts welcome. Thanks.
Nov 7, 2016 15:46:16 #
One technique that might help is Expose to the Right (ETTR). There are some articles on this site, as well as others, discussing this technique and its effect on noise.
--Bob
--Bob
cptiger wrote:
I'm kinda dumbfounded. Using 5DIII, 16-35L, Singh-ray warming polarizer, shooting aperture priority f8 to f11, ISO 200 and I'm getting a lot of sky noise. If it's visible in the sky, it must be throughout the photo. Doing nothing unusual processing in Lightroom and Photoshop CC. What am I missing or doing wrong? All thoughts welcome. Thanks.
Nov 7, 2016 16:23:01 #
cptiger wrote:
I'm kinda dumbfounded. Using 5DIII, 16-35L, Singh-ray warming polarizer, shooting aperture priority f8 to f11, ISO 200 and I'm getting a lot of sky noise. If it's visible in the sky, it must be throughout the photo. Doing nothing unusual processing in Lightroom and Photoshop CC. What am I missing or doing wrong? All thoughts welcome. Thanks.
Are you shooting raw, and if so, have you tried processing the shot with Canon's Digital Photo Professional 4.3 (DPP)? There's a current thread on the subject where I (and others) found more visible noise converting raw Canon files using Lightroom/Photoshop's ACR (Adobe Camera Raw) vs DPP. It's free to download from Canon's European site (http://cpn.canon-europe.com/content/news/dpp_4_3_0_available_with_support_for_more_cameras.do), and you might give it a try - there's an export function where you can transfer the converted file directly to Photoshop if you need further editing.
Nov 7, 2016 17:12:46 #
cptiger wrote:
I'm kinda dumbfounded. Using 5DIII, 16-35L, Singh-ray warming polarizer, shooting aperture priority f8 to f11, ISO 200 and I'm getting a lot of sky noise. If it's visible in the sky, it must be throughout the photo. Doing nothing unusual processing in Lightroom and Photoshop CC. What am I missing or doing wrong? All thoughts welcome. Thanks.
I'm with you, at ISO 200, there should be no noise, even if you have any custom correction settings active in your menu, this does not make sense to me! Sorry, I wish I would be more helpful. I do not think it has anything to do with DPP vs ACR, that has been an always known fact, that DPP creates somewhat cleaner raw files compared to ACR, but even in ACR, at that ISO there should be no noise!!
Nov 7, 2016 17:32:53 #
speters wrote:
... at that ISO there should be no noise!!
That is true about what is called "read noise" or sometimes "ISO noise". But noise in the sky is different because it is probably not generated by the camera, but instead is the result of the random rate of photon arrival. If photons landing on one sensor location are arriving faster than those on the adjacent location the pixel values will be different. It is called photon noise or shot noise. Higher exposure will help, but noise reduction is the only way to eliminate it, even at low ISO values.
Nov 7, 2016 21:29:31 #
Nov 7, 2016 21:35:07 #
cptiger wrote:
Thx, always use raw.
That won't really change photon noise.
Nov 7, 2016 21:56:20 #
cptiger wrote:
I'm kinda dumbfounded. Using 5DIII, 16-35L, Singh-ray warming polarizer, shooting aperture priority f8 to f11, ISO 200 and I'm getting a lot of sky noise. If it's visible in the sky, it must be throughout the photo. Doing nothing unusual processing in Lightroom and Photoshop CC. What am I missing or doing wrong? All thoughts welcome. Thanks.
If that is a daylight exposure at ISO 200, it may be something other than noise.
Can you post an example?
Nov 8, 2016 05:29:22 #
cptiger wrote:
I'm kinda dumbfounded. Using 5DIII, 16-35L, Singh-ray warming polarizer, shooting aperture priority f8 to f11, ISO 200 and I'm getting a lot of sky noise. If it's visible in the sky, it must be throughout the photo. Doing nothing unusual processing in Lightroom and Photoshop CC. What am I missing or doing wrong? All thoughts welcome. Thanks.
It's probably the filter. Also, try using the DPP. That's the software that came with your camera. DPP is probably the best software for noise reduction.
Nov 8, 2016 05:49:47 #
Nov 8, 2016 07:45:24 #
Nov 8, 2016 08:08:22 #
Nov 8, 2016 09:55:42 #
Pull off all your filters and re shoot with a couple of different lenses. Not sure what but something very basic happening here. If no success contact factory.
Good shooting
Good shooting
Nov 8, 2016 10:05:42 #
gvarner
Loc: Central Oregon Coast
cptiger wrote:
I'm kinda dumbfounded. Using 5DIII, 16-35L, Singh-ray warming polarizer, shooting aperture priority f8 to f11, ISO 200 and I'm getting a lot of sky noise. If it's visible in the sky, it must be throughout the photo. Doing nothing unusual processsing in Lightroom and Photoshop CC. What am I missing or doing wrong? All thoughts welcome. Thanks.
Just a thought here. I've read that sky noise is from the atmosphere, not from high ISO. But it can be treated in PP the same way to reduce its effect.
Nov 8, 2016 11:52:37 #
Using a polarizer filter will surely darken the sky and you should see noise if that sky is underexposed.
Get a noise reducing software and you will live happy.
Get a noise reducing software and you will live happy.
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