Dispersion
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DISPERSION The speed of light in a medium depends on the wavelength of the light. As light enters a more dense medium, the short waves, such as blue, are slowed more than the long waves, such as red.
Extra Low Dispersion (ED)
ED, which stand for extra low dispersion, is an adjective that describes a feature of glass that used to make lenses for cameras or telescopes.
Dispersion A phenomenon in which white light rays deviate by different wavelength amounts resulting in a spectrum. The rainbow created by a prism is the result of dispersion.
Dispersion
The property of materials which have a refractive index that varies according to the wavelength of light, i.e.
Dispersion
Light rays of different wavelengths deviate different amounts through a lens causing a rainbow effect around points and edges. The property of materials which have a refractive index that varies according to the wavelength of light, i.
Dispersion circle
Dispersion circle originate when there is a blur in the picture and is the deviation from the projection of a pixel on the motiv in the sensor.
dispersion
(1) the condition of heterogeneous components in a colloid state, such as very finely divided particles of one substance suspended uniformly in the medium of another substance; ...
Dispersion, Light Dispersion
A process whereby White Light is separated into a Spectrum of rainbowlike component wavelengths by, for example, a prism or raindrops.
-Dispersion - ability of glass to bend light rays of deferent wavelengths to varying degrees.
-Distance symbols - symbols used on the focus control of simple cameras, as a focusing guide.
Dispersion is the rainbow effect seen with prisms and the like - white light being split up into a rainbow spectrum of its constituent wavelengths.
Two Special Low Dispersion (SLD) glass elements in the front lens group and one in the rear group offer effective control of color aberration. This lens features full-time manual focusing and a removable tripod collar.
Extra-low Dispersion - This means that the lens has very little color shift when focusing. Colors don't always focus at the same point (think 3D glasses).
"ED" is extra-low dispersion glass, a more expensive and higher-quality glass that reduces chromatic aberration or "color fringing".
"The colorimetry and photometry of daylight Â-and incandescent illuminants by the method of rotatory dispersion". JOSA 7 (12): 1175-1209.
Two FLD (“F' Low Dispersion) glass elements, which have the performance equal to fluorite glass, and three SLD (Special Low Dispersion) glass elements provide excellent correction of color aberration.
They might be trying to say that dispersion (by which they may mean the scattering of light in the emulsion?) is minimized when the image point spread function (smallest possible spot) is minimized - but that happens at wide apertures (f5.6-f8), ...
This series features ED (extra low dispersion) glass, and larger image circles than other lenses in the same category.
The gray clouds serve as a giant diffuser, creating an even dispersion to the light. Little or no contrast is evident and the subtle hues of spring become more saturated.
Photographic emulsion is not a true emulsion, it is a dispersion of small solid particles in a liquid medium which is then allowed to cool and set.
The light sensitive crystals are prepared by the combination of silver-Ag- and a halogen.
This experiment demonstrates evanescent light’s superiority to normal light in terms of dispersion, enabling the light to retain the information required for maximum lateral resolution.
These problems might include some of the following: light dispersion in the film emulsion during exposure, halation (light reflected back from the film pressure plate from bright areas in the image), ...
Image quality shouldn't be a factor when deciding between different brands of extension tubes (all use the same low dispersion air).
Apart from the principal quality of the lens design image quality is also a function of f-stop (technically due to light dispersion and diffraction effects). Usually the maximum picture quality is reached somewhere between f4-11, depending on the max.
Crown glass
Low dispersion optical glass.
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The S8000's lens is optically stabilized and contains an ED (extra low dispersion) element, which should ensure that chromatic aberrations are well controlled - a perennial problem for lenses of this type.
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.
Lenses using internal and automatic focusing also keep lens weight down thanks to less moving parts, and of course allow for faster focusing. Low-dispersion glass leaves photos looking less hazy or fuzzy, ...
Nikon 60mm f/2.8G AF-S Micro - Nikkor Auto Focus Lens with Extra-low Dispersion Glass, 5 Year U.S.A. Warranty
$569.95
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They typically are focused by extension (simple mechanism), don't require aspheric elements (simple lens element shapes), they don't require elements made of glass with anomalous dispersion (simple materials), ...
The lightweight lens uses Special Low Dispersion glass that provides superb correction of chromatic aberration, meaning high image quality is assured throughout the entire zoom range.
(particularly red & blue) into the same plane of focus, thus causing overall blur. Usually found in regular large-aperture telephoto and super-telephoto lenses. Not improved by reducing aperture size. Can be corrected with low dispersion (ED, ...
Dispersion a) The separation of a beam of light into the individual wavelengths of which it is composed by means of refraction or diffraction. b) Resolution of white light into its component wavelengths, either by refraction or by diffraction.
 See also: Light, Photograph, Lens, Image, Camera
  
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