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 ...
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.
Lens aberrations that make the borders of an image bow slightly inwards to the centre forming a shape like pincushion.
Related Terms
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Coma - lens aberration producing asymmetrical distortion of points in the image.
Combination printing - producing a composite image by printing more than one negative on a single sheet of paper.
A lens aberration restricted to off axis image points; the inability of a lens to render point sources of light near the edges of the frame as circular; ...
One of the common lens aberrations, where straight lines at the edge of the field are caused to bend into the shape of a barrel.
Base leg: ...
-Astigmatism - lens aberration making a single point light source impossible to focus as a true point.
Let the lens designers and manufacturers worry about the lens aberrations.
Lens aberrations are ignored. Including the effects of aberrations is nearly impossible, because doing so requires knowledge of the specific lens design.
Barrel distortion
Lens aberration (distortion) where straight lines are formed as curved lines in the image. These barrel shaped lines are most noticeable along the edges of the photo.
(see Aberration & Pincushion effect ) ...
Pincushion distortion
Lens aberrations that make the borders of an image bow slightly inwards to the centre forming a shape like pincushion.
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Using RAW is crucial, as many current cameras can apply lens aberration correction to JPEGs - most notably Nikon DSLRS such as the D3, D300, D70 and D90 feature automatic correction of lateral chromatic aberration, ...
An Aspherical lens surface possesses more than one radius of curvature, which allows for the correction of lens aberrations common in simpler lens designs.
They make no mention of the true causes of changes in resolution with aperture, which is the reduction of the wavefront error via reduction in lens aberrations (principally spherical aberration for the center of the image field in lenses used at ...
The aspherical elements of a lens help compensate for many lens aberrations common in simpler lens designs. Aspherical elements are particularly important for wide-angle lenses, since they are prone to distortion.
Critical Aperture is the f-stop setting where a lens provides the optimal image quality; critical aperture finds the best balance between diffraction from small apertures and lens aberration from large apertures.
Cropping ...
AS AS stands for Aspherical Lens. This type of lens utilizes non-spherical surfaces on either one or both sides of the glass in order to eliminate certain types of lens aberration. Find out more.
It's actually a type of crystal produced synthetically by Canon and used in many of their top of the line L series lenses in place of low dispersion glass. It's an expensive material but is extremely useful for minimizing optical lens aberrations, ...
to these main tools you have available the following as floating tools: histogram, fine tune white balance - using a color wheel, EXIF info, tone curve, highlight controller, fine color controller - using a modified color wheel, lens aberration ...
(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.
Spherical aberration - variation in focal length of a lens from center to edge due to its spherical shape - generally all parts of the image, including its center.
The effects of lens aberration usually increase with increases in aperture or in ...
Aspherical: A surface which is curved and is not spherical. Some lenses are made with such surfaces to correct aberration.
Astigmatism: Lens aberration causing vertical and horizontal lines to focus in different focal planes.
 See also: Aberration, Lens, Image, Camera, Light
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