Antarctica

Antarctica
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9
votes
4answers
762 views

How can I avoid circular banding artifacts in clear skies when de-noising?

I photograph in RAW, and convert using Darktable. Camera happens to be Nikon D40, 55-200mm lens. For a small number of photos, especially of clear blue skies, I cannot reduce noise without introducing ...
8
votes
1answer
652 views

What causes this strange Posterization when changing to B&W?

I have this image that was taken several years ago with a D70. It was taken at 1600 ISO which obviously makes it quite noisy. I really want to convert it to black and white, but when I desaturate ...
8
votes
2answers
209 views

Horizontal banding pattern near sun: sensor flare?

Following is a crop from a RAW shot, developed in Lightroom 5.7, into a setting sun from a Sony A77II – ISO 100, f/5, 1/20s, with a TTL fill flash. In the darker regions near the sun a series ...
6
votes
2answers
5k views

Why does darkening skies in Photoshop cause banding, and how can I avoid it?

I am pretty new to Photoshop (I have Elements 10). When I darken highlights I find that the sky ends up in bands. I have read advice that says to reduce the effect of this by using either blur or ...
6
votes
2answers
502 views

What causes a band-like pattern in photos of a CFL?

CFL Image The image in the above link is that of a compact fluorescent light bulb. I couldn't figure out the reason for the formation of light and dark bands sort of thing in the image. The same ...
5
votes
2answers
9k views

What causes banding noise?

I'm looking for information (and references) on three related topics: What causes banding noise in CMOS sensors? What is the physical/technological cause? Is the cause the same in CCD and CMOS ...
2
votes
1answer
238 views

What is the cause of black bars on a photo of AMOLED display?

What is the cause of those black bars on the picture? Their orientation changes by moving the camera. The display is of a Samsung Galaxy S3 (i9300), an AMOLED display, set to minimum brightness, ...
2
votes
2answers
140 views

Best way to photograph a LED wall (that has people in front of it)

The LED wall is interactive and the challenge is to make pictures that show both the wall and people interacting with it, without having the banding or moire effect, that often happens when taking ...
1
vote
1answer
2k views

Why do I get dark horizontal lines (stripes or bands) in bad lighting with my Fuji X-T1?

Can anyone explain why I get those lines when taking photos in a bad/weak lightning ? I attached some photos.
1
vote
1answer
180 views

How can I remove banding noise from this image?

I'm an complete newbie in photography and I'm trying to use the Sigma 70-300mm F4-5.6 APO lens and a Guppy camera(you can think of it as a processor that captures light rather than an actual camera) ...