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Noise!
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Feb 17, 2023 18:37:47   #
dhsackett
 
Here is a retry. Thanks for you patience


(Download)

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Feb 17, 2023 18:44:54   #
PoppieJ Loc: North Georgia
 
Noise lives in the shadows. Better to Expose to the right then pull the exposure down in post than to under expose and have to pull the shadows up

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Feb 17, 2023 18:45:59   #
NMGal Loc: NE NM
 
Nice!

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Feb 17, 2023 20:31:27   #
Grahame Loc: Fiji
 
Interesting.
Camera Data
Canon R7
RF-S 18-150mm lens at 50mm
1/400s, f/13, ISO1600
LV 12
Centre Weighted Metering

The 'noise' in the image is nothing unusual and could have been reduced by using a slower shutter speed plus wider aperture for this scene. The exposure could also have been pushed more to the right to assist in bringing out the shadows.

But, is your reason for posting the image the strange anomaly of the short white horizontal lines evident throughout the entire image?


(Download)

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Feb 17, 2023 22:11:41   #
dhsackett
 
Yes. three images all with similar artifacts?

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Feb 18, 2023 04:38:30   #
Grahame Loc: Fiji
 
Not a clue. Seems they are all the same horizontal length and vary in thickness.



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Feb 18, 2023 05:08:01   #
R.G. Loc: Scotland
 
F/13 would be a high f-stop even for a full frame camera. Apart from that, there's nothing in the immediate foreground and the focus point (assuming it was on one of the clouds) is well off in the distance. Also, while a focal length of 50mm isn't exactly wide angle, it isn't telephoto either. Those are the three factors that would have justified using a high f-stop but none of them apply here. You could have easily used the widest f-stop available to you. And exposing to the right as suggested would have been a good idea, especially since there aren't any vulnerable highlights to worry about.

The horizontal white lines are a digital problem, not an optical one or an exposure one. There may be a problem with your camera's electronics or software internally. EMI would be a possibility if all of the lines were only one pixel thick but they're not.

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Feb 18, 2023 07:53:17   #
Bultaco Loc: Aiken, SC
 
Grahame wrote:
Interesting.
Camera Data
Canon R7
RF-S 18-150mm lens at 50mm
1/400s, f/13, ISO1600
LV 12
Centre Weighted Metering

The 'noise' in the image is nothing unusual and could have been reduced by using a slower shutter speed plus wider aperture for this scene. The exposure could also have been pushed more to the right to assist in bringing out the shadows.

But, is your reason for posting the image the strange anomaly of the short white horizontal lines evident throughout the entire image?
Interesting. br Camera Data br Canon R7 br RF-S 18... (show quote)



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Feb 18, 2023 08:39:28   #
Jack 13088 Loc: Central NY
 
Can you force the camera to take a photo of a black field? Probably not as easy as it sounds since the “helpful” camera automation will think you are crazy and block that “mistake”.

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Feb 18, 2023 08:54:48   #
Jack 13088 Loc: Central NY
 
Jack 13088 wrote:
Can you force the camera to take a photo of a black field? Probably not as easy as it sounds since the “helpful” camera automation will think you are crazy and block that “mistake”.


I would try to duplicate exposure in fully manual mode with those exact settlings and the lens cap on. If you can pull that off and still see lines set camera to repeat in raw plus jpeg which could narrow down the origin of the fault.

Otherwise, you can publish the images in the respected “Journal of Irreproducible Results”!

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Feb 18, 2023 11:30:18   #
dhsackett
 
Thanks to everyone who responded. I got these lines on 4 exposures (all at high F-stops). Not seen before or since.

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Feb 18, 2023 11:38:53   #
TriX Loc: Raleigh, NC
 
Why 1/400 on a landscape? Instead, maybe 1/60 at f11 (or f8) and drop the ISO way back (100-200). Noise issue (and diffraction) addressed

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Feb 18, 2023 14:49:47   #
Grahame Loc: Fiji
 
dhsackett wrote:
Thanks to everyone who responded. I got these lines on 4 exposures (all at high F-stops). Not seen before or since.

Was there any transmission towers/apparatus in the vicinity where you took these shots?

Did the anomaly just happen to images at one location?

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Feb 18, 2023 18:45:50   #
dhsackett
 
These were taken on my deck. I have taken many! pictures of clouds off this deck and never seen this problem. (I can't hold the camera steady at 1/60).

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Feb 18, 2023 18:49:58   #
TriX Loc: Raleigh, NC
 
dhsackett wrote:
These were taken on my deck. I have taken many! pictures of clouds off this deck and never seen this problem. (I can't hold the camera steady at 1/60).


Have you tried? The R7 has IBIS.

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