Aberration
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Aberration
The inability of a lens to produce a true image, particularly at the edge of a photograph.
Usually, the more expensive the lens, the better its optical quality and the fewer aberrations.
Aberration
Aberration, also known as "color fringing," refers to the effect in which light passing through a lens becomes blurred and produces a fuzzy image on the film.
Aberration
Techniques Glossary Aberration
Optical problem in a camera lens that produces slight errors in subject appearance, usually noticeable in small details.
Chromatic aberrations (CAs) manifest as unwanted colour banding, especially around high contrast edges. They occur when a lens bends some colours of light more than others, resulting in disperison. Lenses are designed to minimise CAs.
Chromatic aberration is visible as color fringing around contrasty edges and occurs more frequently around the edges of the image frame in wide angle shots.
Example of cyan and red fringing
Achromatic / Apochromatic Doublets ...
Spherical aberration
A lens fault which causes loss of image definition at the image plane. Its affects are reduced by stopping down.
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More Photographic Terms ...
If you have ever looked through cheap children's binoculars the effect of chromatic aberrations will be all too familiar to you.
This 'purple fringing' can sometimes be found on digital cameras as well.
ABERRATION -
(1) Something that prevents light from being brought into sharp focus, disenabling the formation of a clear image.
(2) Lens flaw - the inability of a lens to reproduce an accurate, focused, sharp image.
Aberration
Imperfection in an image caused by deficiencies within a lens or optical system. These can affect colour, sharpness and shape.
Air Release
Also called a pneumatic release.
Aberration.
Failing in the ability of a lens to produce a true image. There are many forms of aberration and the lens designer can often correct some only by allowing others to remain.
Aberration
An optical defect in a lens causing it to form an image that is not sharp or that is distorted. This can take the shape of edge distortion or a lack of sharpness.
aberration
(1) a disturbance in color that interfere with clarity, typically one of the faults found in interpolated colors; ...
Aberrations - Irregularities in glass that lead to the incorrect focusing of light, resulting in abnormalities in photography.
Acquire Plug-in - A connection that allows for communication between a digital camera and image editing software.
Aberration
Usually used in the context on lens performance to describe an imperfection. Deviation, Wandering away, The nonconvergence of rays of light to one focus.
AA Filter ...
Aberration
A distortion of image quality or color rendition within a photographic image caused by optical limitations of the lens used to produce the image.
Lens aberration
Optical flaws which are present in small amounts in all photographic lenses; made up of chromatic aberration, spherical aberration, curvature of field, distortion, etc.
Lens aberrations Edit
aberrations, explained on homepage of JML
lens triplet in wikipedia
shareware document of Darko Vasiljevic about triplet optimization ...
Aberration: The inability of a lens to form a perfect, sharp image.
Achromat: A lens that is able to bring two primary colors of the spectrum to the same point of focus.
Acid fixer: A chemical used to neutralize alkali.
Aberration
Essentially, anything in an image that is not supposed to be there. For example, optical imperfections within a lens may cause distortions such as barrel distortion or pincushioning.
Aberrations are the blurring and distorting properties of an optical system. A high quality lens will produce a smaller amount of aberrations.
Lens aberration effects show up along contrasty edge detail in the photo near the actual edge of the frame. The best solution is to enlarge the photo so you can better see the defect. You'll see edges that include extra colors, often green or red.
These aberrations are difficult to spot during a dive because the rear element of an amphibious lens is not visible to the diver. Even with an SLR, the problems might not show up through the viewfinder.
Color aberration correction. Really good optics minimize color fringing, but some fringing is inevitable, especially when corner areas of an image are highly magnified.
Aberration Chromatic:
An optical image distortion conditional on the varying refraction of light rays of different wavelengths on a lens. Thus light rays of shorter wavelengths have longer focal distances than light rays of longer wavelengths.
Another aberration, Distortion, affects the shape of the image (pincushion and barrel distortion) , but not the sharpness. It makes staight lines look "bowed" near the edges of the image.
Chromatic Aberration
This effect often occurs in digital cameras of two megapixels or more, using a long telephoto lens. It can be seen as a ring of purple color separating a dark area of a picture from a light area that surrounds it.
Chromatic aberration and purple fringing are two distortion effects that can negatively affect photographs. There are a couple of things you can do to minimize these effects.
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Chromatic Aberration
In digital imaging most often seen as unwanted purplish lines along edges separating dark and light areas.
CIFF ...
chromatic aberrations
Every lens, to a greater or lesser extent, focuses the light of different wavelengths onto different focal planes and magnifies it differently.
Chromatic Aberration A phenomenon in which light rays passing through a lens focus at different points, depending on their wavelength.
Chromatic Aberration
Software Help For Optical Problems
Monochrome Color
Seeing And Creating ...
Chromatic Aberration & Purple Fringing
All super zoom cameras suffer from some fringing (though Panasonic's processing removes it before you ever see it), and this camera's predecessor (the H5) was the worst offender.
Chromatic Aberration
A fringing effect around the edges, which is caused by lens not focusing correctly.
CIFF ...
chromatic aberration:
Also known as color fringing, this problem is caused when the camera lens do not focus the different wavelengths of light onto the exact same focal plane.
Chromatic Aberration - Also known as the "purple fringe effect." It is common in two Megapixel and higher resolution digital cameras (especially those with long telephoto zoom lenses) when a dark area is surrounded by a highlight.
Chromatic Aberration. Also known as purple fringing. It is fairly common in 2MP digital cameras and above, especially if they have long telephoto lenses. You can see it when a dark area is surrounded by a highlight.
Chromatic aberration. An image defect, often seen as green or purple fringing around the edges of an object, caused by a lens failing to focus all colors of a light source at the same point.
Chromatic Aberration: In photographic or lithographic process lens, the result of the unwanted dispersion of light so that colors of the white light spectrum are focused on slightly different distances on a single plane.
Chromatic Aberrations, Fringing, & Flare
I did not notice any aberrations or fringing in the 100% crops of the photos that I took, and the photos pointing toward the sun did not have any significant flare. Well done, Panasonic! ...
-Chromatic aberration - inability of a lens to bring light from the same subject plane but of different wavelengths to a common plane of image or focus.
-Chromaticity - objective measurement of the color of an object or light source.
The Chromatic Aberrations Correction module, which is available for licensing, provides functions which automatically correct aberrations, minimizing the circle of confusion. It is the only available technology for completely automatic CA correction.
Under Chromatic Aberration set the following:
Red / Cyan - compensates for red/cyan color fringing.
Blue / Yellow - compensates for blue/yellow color fringing.
Defringe - choose Highlight Edges or All Edges to see what produces the better result.
Correct chromatic aberrations, vignetting, minor distortion.
Correct anything that was not fully handled in raw conversion.
Color Mode ...
APPENDIX I GLOSSARY ABERRATION -A defect in the formation of an optical image; for example, astigmatism, chromatic aberration, curvature of field, and so forth. ABSOLUTE TEMPERATURE-The temperature measured from absolute zero.
(Chromatic aberration is corrected).
Top of Page ASA
American Standards Association; (see ISO).
Top of Page B (Bulb)
At the B setting, the shutter remains open as long as the shutter release button remains fully depressed.
Achromatic Lens An Achromatic lens is a system of lenses joined in order to minimize color and shape distortions (chromatic and spherical aberrations) that are inherent in a single lens system.
"APO" elements (UD, SUD, CaF2, LD, SLD, ED etc.) improve contrast and sharpness by reducing chromatic aberration (color defects) that usually occur in tele lenses.
I also tick "Reduce chromatic aberrations" and "Reduce noise".
Next, if you have any objects that were moving between your three shots, you will need to tick "Attempt to reduce ghosting artifacts", "Background movements.
Spherical lenses are subject to aberration and therefore cannot concentrate all the light into one point.
Many are cheap and poorly-made and can cause distortion, chromatic aberration, and other problems and are often quite soft, especially on the edges, as you've found.
It did a great job of correcting the consequences of lens defects such as barrel and pincushion distortion, chromatic aberration, vignetting and blur, but there was no way I could justify buying it.
This is called spherical aberration. In most lenses, spherical aberration is an undesirable trait as it causes the lens to be less sharp. On the other hand, in a soft focus lens, spherical aberration is desired as it softens the image.
I've recently found the aligning feature for image stacks is far superior in CS5 to the tonemapping software, as is the chromatic aberration removal in Adobe Camera Raw. So my workflow and overall IQ is improved over what it used to be.
This won't make up for poor focus, camera shake or the spherical aberration that often comes with shooting lenses wide open (these are all way too complex phenomena to correct this way), but it will give it a bit of a sharpness "kick".
(This is called curvilinear distortion.) There are other lens aberrations that make it difficult to keep the entire image in focus at the same time.
A similar affect is called Chromatic Aberration. These effects are caused when you shoot a subject that is strongly back lit. All lenses can have this problem...
Bronzing is a printing aberration that is almost exclusive to dye-based printers.
The lens does not show any distortion or aberrations. The focus is precise. I recommend this lens, as I have never had any trouble with it. It still is my main workhorse.
Canon EF 70-200mm f/4L USM - Cheapest L wonder ...
An optical aberration of a lens. Extreme example: a fish-eye lens. The term is often misused to describe the exaggerated Perspective effect of any lens when used too close to a subject, resulting in Big-nose-small-ears Syndrome.* ...
 See also: Camera, Image, Lens, Light, Photograph
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