Questions tagged [aberration]
a property that deviates from the desired behavior
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Compensate aberration to improve the quality of a surveillance camera
I am analyzing the videos recorded by a surveillance camera and noticed that, in most scenes, there is a sort of "halo" around the right part of people passing by (also around the orange ...
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What is this called and what causes it? Bright highlights along contrasting edges
I've been looking at some sample photos from different mobile phones and I've noticed some of them have this weird feature: edges where contrasting colors meet have an additional glow. Presumably this ...
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Easy tool to correct geometry of photographed document
I know there is already an answer to this question on either photo.SE or something about imaging SE but after trying gazillions of search terms and word combinations until exasperation (and of course ...
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How does using more spherical lenses compensate for spherical aberration?
I've heard of three common ways to compensate for spherical aberration:
Small aperture (fewer non-paraxial rays).
Aspheric lens (compensate with lens shape/material).
Corrective spherical lens ...
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What is behind this symmetric coma like effect, and literally odd-ball bokeh, in a triplet lens?
The example picture, shot with a vintage triplet (Staeble Kata 45mm/f2.8, wide open, on APS-C, no further crop), shows a curious shape of coma-like cross pattern in the right- and leftmost sculptures -...
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What is lens astigmatism?
Can someone simply explain astigmatism and its different types?
How are they caused in lenses, and how can they be identified in images?
I'm looking for a simple, understandable explanation. I've ...
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In photo taken with a prime lens, what is the cause of the "zoomed" bokeh appearance?
This image was taken with a Vivitar 24/2 (Kiron) prime lens. The lens is sharp. The focal plane is reasonably flat, and there is barrel distortion.
The bokeh balls have an oval shape in which the ...
- 27k
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What causes color artifacts on the strings while shooting guitars?
We're doing a photoshoot of a guitar collection. The photos are coming out great, but there is a specific color aberration on the strings. The guitar strings are braided by a thin metal wire, which ...
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What's the relationship between chromatic aberration, ISO and long-exposure noise reduction?
I took a photo that has what seems like chromatic aberration. It's a purple color at the left and bottom edges, especially at the bottom-left corner:
This is a 30-second exposure at ISO 3200 with the ...
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Is it chromatic aberration? [duplicate]
I got green ghost-like lights.
Where do they come from?
How could I avoid them while shooting?
How can I remove it in post processing?
I tried using Lightroom chromatic aberration correction ...
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Is it normal for a fast prime to exhibit purple fringing in middle of the image?
I have just bought a Nikon 50mm f/1.8D prime lens.
I took this picture (leg of my glasses frame on a mouse, and a LED desk lamp is on top of it) : f1.8, 1/80s, ISO 200
The purple fringing is right ...
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How to fix chromatic aberration with free software?
Here is a zoomed-in example of an image I shot that has a bit of discoloration due to the chromatic aberration of the lens.
What's the easiest way to fix this problem using only free software such ...
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How to minimize/avoid purple fringing before/during shooting?
I know it is possible to avoid purple fringing using post-processing software's chromatic aberration correction capabilities but I have a few pictures where the one I'm using (Rawtherapee on Linux) ...
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Can gripping a lens too hard cause softness/aberration or other damage?
I have a Nikon D80 kit lens with a circular screw-on polariser filter. In order to remove the filter I might have to grip the lens quite hard, and the end of the lens might be moved about in the ...
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Which lenses show focus shift?
Some lenses, because of a design that includes uncorrected spherical aberration, shift their plane of focus backwards as the aperture is narrowed. This is most apparent at close focusing distances and ...
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Compensating for Focus Shift?
Some lenses, because of a design that includes uncorrected spherical aberration, shift their plane of focus backwards as the aperture is narrowed. This is most apparent at close focusing distances and ...
- 1,422
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What can cause different aberration on left side and right side of photo?
I got a photo of starry sky where I find different kind of aberrations on the left side and the right side of photo. It seems consistent in various photos so far, but this lens is quite new to me and ...
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Is it a bad idea to activate lens-corrections in camera, when also use lens-correction in Lightroom?
My EOS has the option to correct known lens-aberration which is activated at the moment.
I use Lightroom (5.2) for post-processing, which can also correct lens-aberration.
Is it a problem to ...
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What causes longitudinal chromatic aberration on Nikon 50mm f/1.4D?
I have looked on my new 50mm lens photo (I have Nikon D90) and I see "purple fringing" around the unfocused objects (longitudinal chromatic aberration). What's is going on? Is it common for this lens (...
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What is the meaning of these Photodune reasons for rejection?
I wanted some advice, I am new to photography, I posted an image on Photodune for sale and it was rejected because of:
Element or framing composition
Noise, exposure, lighting or saturation
Chromatic ...
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What are these lines through my images (on the negatives and the prints)?
I have these lines or streaks across many of the images on this roll I had developed. I can see the same lines on the negatives as well as the prints. The lines are in the exact same spot across I ...
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Is it technically possible to build a camera body to correct for lens defects?
Most lenses tend to be expensive because the lens needs to be very complicated in order to correct for various optical effects (aberration, etc). Is it possible to build a sensor and processor ...
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Is this sensor ghosting, or something else?
I recently took some shots of a house fly, primarily for use in a simple case study of print sharpness that I posted here. Several of the shots turned out fairly well with flash, however they all seem ...
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How many optical aberration types are there in lenses? And what are they?
Everyone hears something about chromatic aberration but are there any other types? What causes them?
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