Elements of a photograph that are generally undesirable or have a negative impact. Examples include noise, flare, dead or hot pixels, sensor "spots", reflections inside the camera/lens system, etc.
Questions tagged [artifacts]
235 questions
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votes
2 answers
What is the cause of this unusual concentric blob defect (taken in below zero conditions)?
My brother took a number of pictures in the alps recently, and a few of these showed defects similar but not identical to the one below. The temperature was -14 C which doesn't seem unreasonably cold. Any ideas what this might be? Full res…
ARM
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5
votes
3 answers
What are the cross patterns in this image?
On the bottom left area of this image, we can see a very prominent pattern of straight lines in two directions crossing each other
Full version of the pic is available at https://i.stack.imgur.com/NC5Ft.jpg
Is there a technical term for this? What…
Lazer
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4
votes
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Unusual horizontalish line on photograph
I just watched a SmarterEveryDay video about a shot of the blood moon over a Saturn 5 rocket model (which is kinda interesting).
In that shot he got an unusual horizontal line across the moon intersecting the tip of the rocket.
I think this is a…
undefined
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votes
1 answer
What is this RGB artifact and how did it form?
I took this with my Nikon DSLR about a month ago. Today I was going through the photos and was just about to delete this otherwise unremarkable picture when I noticed a large artifact over the image of my wife's iPhone. It looks like a reflection.…
Blago
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Why is the bloom effect colored?
I've seen many photos where the bloom has a color close to the color of its source.
From what I've read, the bloom is caused by an overflowing of the potential well into neighboring sensors. Since this happens after the color filtering, the bloom…
Bernard Lupiac
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2
votes
2 answers
Is an artifact in form of a purple dot squat in the middle of the picture an effect of lens optics?
This is related to a question asked on Space.SE:
Is this purple dot really caused by Cassegrain optics and coherent backscattering?
Zoomed in:
Is this sort of artifact known in photography? If so, what is its cause?
(please, no guessing games. If…
SF.
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votes
1 answer
What is the cause of this red-green artifact and how can I prevent it?
When I take photos, I have the same kind of artifact like in this photo (but not as much) :
What is the cause of this artifact and how can I prevent it ?
An example from my camera, note particularly the pamphlets on the bricks near the…
Anonymous
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vote
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What causes these reddish spotty artifacts?
I'm just experimenting with a new lens.
Here is an image I took tonight into the sun. I was trying to capture the rays. I was surprised by the spots that appear on the grass below where the sun is situated as I've never seen an artifact like that…
Octopus
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vote
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What is this golden streak artifact in this photo?
This was taken at 1/500sec, iso64, f/2.8, 122mm focal length. Nikon D850, 70-200mm lens.
At first I thought it was her hair, but it seems to be very reflective and moving very fast:
At 100%
It even seems to change direction at the bottom. If it…
rrauenza
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vote
1 answer
Green dot in center of photo
When I have to take a photo with smaller aperture and zoom I always get a weird green dot in the center of the image. Please, advice what causes this artifact and a proper way to avoid or fix it.
--- Added
Camera: Sony Alpha 6000,
Lens:…
Andrew B
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0
votes
2 answers
What caused these red blotches on the black suit?
My first question. In several wedding photos the groom's black suit has red blotches on it in the photos. The shots were taken with a Canon 6D with a 70 - 200mm lens at 120mm, ISO 250, 1/400 sec., f/2.8. See photo below for an example. There is a…
Canadaloon
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what are these strange artifacts on this photo?
what are these strange artifacts on this photo?
how to avoid them?
photo is shot with canon 1200d 50mm f1.8 4seconds shutter
thank you
alexpoly
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0
votes
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Pixel 6 Pro Very Strange Artifacts
This is my friends old photo, and many are convinced that this is a ghost, hehe, but you can clearly see curved bars that make up the image. I've spent way too long trying to find the answer, can any of you solve the mystery?
Judith
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votes
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What kind of artifacts am I looking at and how can I differentiate between those and stars
I like this picture of the Pacific Ocean, taken from the ISS.
It seems as if I can see stars in the background, but similar dots are visible in the ocean. I presume some kind of artifacts? What am I seeing there, is it a result of jpeg compression,…
hurdsean
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votes
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Mysterious signs or easily explainable artifacts?
These images were taken with an old cheap mobile phone. Could someone please explain what's happening?
D. B.
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