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Old 6th of November 2013 (Wed)   #1
tdonnelly0987
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Default Grand Canyon- Dark Circles in Sky

Does anyone know why there are small dark circles are in the sky? The photo was edited with Light room, Nik color efex pro and sharpened with Nik outpiter sharpener 3. How docyou correct this?

Any input is greatly appreciated.
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Last edited by tdonnelly0987 : 6th of November 2013 (Wed) at 11:02.
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Old 6th of November 2013 (Wed)   #2
magoosmc
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Default Re: Grand Canyon- Dark Circles in Sky

Odds are your sensor is dirty. Clone them out and/or clean your sensor.
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Old 6th of November 2013 (Wed)   #3
tmoore323
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Default Re: Grand Canyon- Dark Circles in Sky

no picture
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Old 6th of November 2013 (Wed)   #4
tdonnelly0987
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Default Re: Grand Canyon- Dark Circles in Sky

Quote:
Originally Posted by tmoore323 View Post
no picture
Sorry I was having trouble uploading the file because it was too large. Its posted now.
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Old 6th of November 2013 (Wed)   #5
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Default Re: Grand Canyon- Dark Circles in Sky

Looks like sensor dust to me. If your aperture was really small, it could be dust on the camera-side surface of the lens.
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Old 6th of November 2013 (Wed)   #6
morph2_7
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Default Re: Grand Canyon- Dark Circles in Sky

+1 for sensor dust. Easy to clone them out in the picture shown but would be better if you clean your camera sensor.
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Old 6th of November 2013 (Wed)   #7
tdonnelly0987
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Default Re: Grand Canyon- Dark Circles in Sky

Thanks guys. I'll check the sensor tonight. Its possible that it got dusty because I was swapping out lenses quite often.
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Old 6th of November 2013 (Wed)   #8
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Default Re: Grand Canyon- Dark Circles in Sky

I've had this issue in the past, and I know how frustrating it may be. As others have said.. sensor dust is the issue and I agree. One thing to keep in mind is most cameras have an auto dust cleaning button where the camera will vibrate your sensor in effort to shake the excess off. In other cases where the auto function isn't really helpful.. check out some youtube videos to properly clean your sensor. Good luck!
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Old 6th of November 2013 (Wed)   #9
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Default Re: Grand Canyon- Dark Circles in Sky

+ whatever the count.. Sensor dust. Time for a cleaning.
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Old 7th of November 2013 (Thu)   #10
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Default Re: Grand Canyon- Dark Circles in Sky

I'd guess that you used a high # f-stop, but since everything is at infinity focus, you probably could have used ISO 100 & f/5.6. Your lens actually is sharper at f-stops about 3 stops up from wide open. So if you don't need f/16, you don't have to clean as much.
Some personal views on Sensor cleaning.
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Old 8th of November 2013 (Fri)   #11
Bianchi
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Default Re: Grand Canyon- Dark Circles in Sky

Until you clean your sensor, which should be as soon as possible. In LR PP its a very easy remove of those spots.
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Old 8th of November 2013 (Fri)   #12
tdonnelly0987
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Default Re: Grand Canyon- Dark Circles in Sky

Quote:
Originally Posted by PhotosGuy View Post
I'd guess that you used a high # f-stop, but since everything is at infinity focus, you probably could have used ISO 100 & f/5.6. Your lens actually is sharper at f-stops about 3 stops up from wide open. So if you don't need f/16, you don't have to clean as much.
Some personal views on Sensor cleaning.
I shot all my photos between f/8 and f/11. I found it pretty easy to edit the sensor dust in Lightroom even tho it can be tedious. I am going to try cleaning my sensor this weekend.

I ran into another problem with a panorama. There is a blue line that runs across 3/4 of the sky. I thought about just cropping the sky out however that leaves the photo too long for my liking.
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Old 8th of November 2013 (Fri)   #13
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Default Re: Grand Canyon- Dark Circles in Sky

When you push your image to far in PP, you can experience banding.. That's what your seeing. You actually have it in your first image also.
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Old 9th of November 2013 (Sat)   #14
vengence
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Default Re: Grand Canyon- Dark Circles in Sky

Bracketed exposures and combine could do wonders for some of these shots...
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