The pupil magnification of an optical system is the ratio of the diameter of the exit pupil to the diameter of the entrance pupil. The pupil magnification is used in calculations of the effective f-number, which affects a number of important elements related to optics, such as exposure, diffraction, and depth of field. For all symmetric lenses, and for many conventional photographic lenses, the pupils appear the same size and so the pupil magnification is approximately 1.
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The pupilmagnification of an optical system is the ratio of the diameter of the exit pupil to the diameter of the entrance pupil. The pupil magnification...
optical magnification. When this number is less than one, it refers to a reduction in size, sometimes called de-magnification. Typically, magnification is...
[citation needed] Transmittance Diaphragm (optics) Pupilmagnification Hecht (1987), p. 152. "Aging Eyes and Pupil Size". Archived from the original on 2013-10-23...
working f-number, m is the lens's magnification for an object a particular distance away, P is the pupilmagnification, and the NA is defined in terms of...
the exit pupil. The exit pupil is the cylinder of light exiting the eyepiece and entering the pupil of the eye; hence the lower the magnification, the larger...
1899 by W. H. Walmsley for close-up images with less than 10 diameters magnification, to distinguish from true photo-micrographs. Development of the photo-micrograph...
in which the entrance pupil and exit pupil are both of diameter A. More complex lens designs with a non-unity pupilmagnification will need a more complex...
the square of the exit pupil as measured in mm; a 36 mm objective lens diameter divided by the 4× magnification gives an exit pupil of 9 mm; (9×9=81) A relatively...
proportionally more expensive) Exit pupil Exit pupil is defined as the diameter of the objective lens divided by the magnification and expressed in mm. (e.g. an...
two different binoculars have equal magnification, equal quality, and produce a sufficiently matched exit pupil (see below), the larger objective diameter...
approximately 15 times magnification. Indirect ophthalmoscopy one that produces an inverted, or reversed, image of 2 to 5 times magnification. Each type of ophthalmoscopy...
created by the objective, on the retina of the eye.) The amount of magnification depends on the focal length of the eyepiece. An eyepiece consists of...
bi-telecentric (or double-telecentric) lens, both entrance and exit pupil are at infinity. The magnification is constant despite variations of both the distance of...
clipped image. The exit pupil width of say, a binocular, can be calculated as the objective diameter divided by the magnification, and gives the width of...
and objective diameter or inside the same scope at a lower magnification. Smaller exit pupil diameter makes it more difficult to get in the correct position...
86 mm Weight = 690 g Magnification = 3.4× Field of View = 8 degrees (14.1 m @ 100m) Entrance Pupil Diameter = 28 mm Exit Pupil Diameter = 8.5 mm Eye...
limits light propagated through the system. More specifically, the entrance pupil as the front side image of the aperture and focal length of an optical system...
to exit pupil larger than eye pupil, exit pupil smaller, and sky background effectively black. Bowen's anomalous limit at highest magnification with the...
tonic contraction of the pupil with accommodation. (3) Segmental iris constriction. When carefully examined under magnification, the iris does not constrict...
the PU telescopic sight a 6.5× power. Magnification: 3.5× Objective diameter: 21 mm Field of view: 4° 30′ Exit pupil: 6 mm Eye relief: 72 mm Limiting optical...
from inside the camera is the lens's exit pupil. In this simple case, the aperture, entrance pupil, and exit pupil are all in the same place because the only...
60 x 55 mm Weight: 417 grams Magnification: 4× Field of view: 10 degrees (177 mils) Objective diameter: 25,5 mm Exit pupil: 6.375 mm Eye relief: 25 mm...
lenses (without cylinder) is: Magnification = 1 ( 1 − ( t n ) P ) ⋅ 1 ( 1 − h F ) {\displaystyle {\textrm {Magnification}}={\frac {1}{(1-({\frac {t}{n}})P)}}\cdot...
the magnification of the individual zones is the same, it is not the same for red as for blue; and there is a chromatic difference of magnification. This...