Aspherical lens
A curved lens with a non-spherical surface. Used to decrease aberrations and permit a more compressed lens size.
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Aspherical (ASP)
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Aspherical Lenses
Aspherical lenses are lenses with complex curved surfaces, such as where the radius of curvature changes according to distance from the optical axis.
Aspherical lens
Techniques Glossary Aspherical lens
A lens element that doesn't form part of a sphere. This is physically difficult to manufacture as most grinding/polishing equipment operates with a spherical action.
Aspherical Elements
Aspherical elements are meant to reduce the level of distortions and to improve the sharpness at the image borders. Basically aspherical elements can optimize the focus of edge and center light rays (see picture below).
Aspherical Lens: A lens designed to reproduce images better by having its edges flattened so that it is not a perfect sphere, hence: "a" (not) "spherical" (a sphere).
Aspherical Lens - A lens whose edges have been flattened so that it is not a perfect sphere, produces a superior image.
Automatic Exposure - The camera automatically adjusts the aperture or shutter speed or both for the proper exposure.
Aspherical - A lens with a non circular, non spherical shaped surface. This is useful for correction of certain distortions in an image.
Aspherical lens
A lens whose curved surface does not conform to the shape of a sphere; lenses are usually ground or molded with spherical surfaces; ...
Aspherical surface
An Aspherical lens surface possesses more than one radius of curvature, which allows for the correction of lens aberrations common in simpler lens designs.
Aspherical Lens
This type of lens is not a symmetrical column or tube. The edges are flattened, which creates a much better image than a standard lens shape.
Active Auto-Focus ...
Aspherical surface
A lens surface that possesses more than one radius of curvature. The aspherical elements compensate for the multitude of lens aberrations common in simpler lens designs.
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ASP - Aspherical Lenses. Lenses with this designation indicates that the lens uses at least one aspheric element. Usually, these lenses have a reduced number of component lenses and a compact size (although not necessarily), and improved performance.
ASPHERIC (ASPHERICAL) LENS - A lens element that changes shape across its surface as opposed to one having a smooth continuous arc.
Something is aspherical, probably the magenta blob above.
Multicoated.
Angle of View top ...
aspherical
auto exposure - An in-camera exposure system that attempts to set the aperture and shutter speed (and CCD sensitivity in many digital cameras) to get the best exposure for the current lighting situation.
- Construction: 11 elements in 9 groups (including 2 ED elements and 4 aspherical elements)
Image stabilization
Vibration Reduction lens-shift stabilization
Digital zoom
up to 4x
Focus
- Autofocus (single or full-time)
- Macro focus ...
^ "Lenses: Fluorite, aspherical and UD lenses". Canon Professional Network. Retrieved on 2008-10-04.
^ Gottermeier, Klaus. "The Macrolens Collection Database". Retrieved on 2007-11-05.
^ Cavina, Marco (August 25, 2006).
6 uses SLD and aspherical lenses for producing sharp images with internal focusing. Lens is very light weight and compact. It weighs 18 oz and is 3.5 inches long. Sigma's 28-300mm version also uses SLD and aspherical glass.
There are three basic ways to make an aspherical element. The expensive way is to grind a piece of glass down to the right shape.
Schneider lenses of particular note include the Super-Symmar XL series with their aspherical lens elements. The 110mm f/5.6 Super-Symmar XL lens is extremely popular, and often listed as a "favorite" lens in many a photographer's arsenal.
8 Leica DG Macro-Elmarit Aspherical Lens Mega O.I.S. ($670)
Billed as the world's first Leica lens for Micro Four Thirds, the Panasonic/Leica 45mm f/2.
How sharp the lens is has a lot to do with how carefully it is crafted - out of what materials, if any of the elements have aspherical shapes, et cetera. In general, a bigger lens will be much more likely to project an image sharply.
Two winters ago, on the spur of the moment, I found myself on the Brooklyn Bridge with my camera, freezing my asphericals off, worrying more about frostbite than composition, exposure and depth of field. My results were less than spectacular.
"I came across the Sigma 28-300mm f/3.5-6.3 DG IF Macro Aspherical Lens for Canon SLR Cameras, what is your opinion of this lens I have seen mixed reviews?" ...
With two extra-low dispersion glass elements and three aspherical lens elements, the lens delivers high-resolution, high-contrast images while minimising chromatic aberration. Ideally suited for use on Nikon DX-format and FX-format cameras.
blocks rays of light that would pass through far from the center, where the lens glass may less closely approximate (usually with various easy-to-make spherical surfaces) the shapes that would focus it perfectly (usually much more complex aspherical ...
 See also: Image, Light, Lens, Camera, Focus
  
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