Examples of using Exit pupil in English and their translations into German
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Colloquial
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Computer
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Political
Ditto, exit pupil for older people.
Visual observation(dark skies): Very good, for telescopes of all apertures and high exit pupil.
Exit pupil 5 ensures good sight even in poor light conditions.
First of all, the magnification factor has a direct effect on the exit pupil, the twilight factor and also the relative brightness.
With 2 mm exit pupil, the eye already perceives 80% of the maximum theoretical resolution;
Close the aperture diaphragm using the crank(30b.1)until the edge of the diaphragm appears in the exit pupil of the objective aperture diaphragm plane.
Exit pupil is reduced from 9.5 to 2.3 mm at 25x, while eye relief stays the same 95mm.
When looking through binoculars, it is important that the human pupil is preferably smaller orin any case not bigger than the exit pupil of the binoculars.
With an exit pupil of 6-7 mm, the maximum brightness is obtained for sky objects that do not exceed this size;
In the following table, I calculate the focal lengths andmagnifications in addition to the exit pupil of 7 also for an exit pupil of 6.5.
If the exit pupil of the binoculars is bigger than the eye pupil, then it is easy to position the eye behind the lens.
The minimum magnificationis defined by the fact that the diameter of the telescope's exit pupil is the same as that of the eye pupil our"entrance pupil. .
The exit pupil determines, how bright the image of a certain object, for example, the moon, will appear in the eye piece.
The diameter of the foremost or front lens of theobjective determines how much light enters the binoculars and therefore greatly affects the clarity and brightness, the exit pupil and the twilight factor of the binoculars.
If the exit pupil is smaller than the pupil of your eye it will be more difficult to get a clear image leaving you with black edges.
In optical devices for direct visual observation-e.g. telescopes and binoculars- the exit pupil is the diameter of the ray bundle that leaves the eyepiece according to Wikipedia.
If the exit pupil is smaller, then you will soon notice that it is far more difficult to obtain a good image because you are constantly trying to get your binoculars into a good position.
However, the new ULTRA design makes very effective use of exotic materials at the furthest limit of glassmaking technology, and as a result is well corrected foruse with virtually all fullframe SLR lenses regardless of exit pupil distance.
Omegon PS72/432 with focal ratio F/6, exit pupil 7 mm>> focal length 42 mm; with an exit pupil of 6 mm, it is still 36 mm, with one of 4 mm, it is only 24 mm.
I would like to note that circle of the same size means that the sections of the sky are identical, but the"visual impression"can be different because the magnification of the eyepieces can be different and consequently the exit pupil and the apparent angle of view given by the eyepiece type.
Focal ratio F/10(e.g. Celestron C8-Series), exit pupil 10 mm>> focal length 100 mm; with an exit pupil of 8 mm, it is still 80 mm, with one of 7 mm, it is only 70 mm.
These two new models have been improved under mostly all points of view, from performances to service life, they can be used with a tripod and sport a field of view that can range from 94 mt to 1 km(for the 2339 10x50 model) orfrom 80 mt to 1 km(for the 2340 12x50 model); the exit pupil stands respectively at 5 mm and 4.1 mm, with long eye relief in both cases.
A large 6-millimeter exit pupil makes these binoculars an excellent tool for observing at dusk, dawn and even at night under dim lighting conditions.
If one disregards certain influencing variables, such as the quality of the sky or the practical availability of certain eyepiece focal lengths,and focuses on the exit pupil criterion, one can say that the exit pupil to the eye limits both the minimum and maximum usable magnification of a telescope I mentioned this already when discussing the exit pupil.
The exit pupil can be determined by the magnification and the aperture of the telescope, but also by the focal length of the eyepiece and the aperture ratio of the telescope, so it is not an"eyepiece property.
In practice, this means that the corresponding focal lengths foreyepieces can be calculated from values for the exit pupil, as they are typically given in the recommendations for the focal lengths of eyepieces AND from the focal ratio of the telescope at hand.
The magnification, like the exit pupil, leads directly to an eyepiece focal length, the other criteria are more suitable for the comparison of eyepieces with similar or the same focal length- or also serve as a"unique selling point.
Same viewing angle: The(U)WA eyepiece shows the same section of the sky; the magnification is higher,so you may see details better, but the exit pupil, and thus the brightness, is lower. Everyone has to decide for himself and try it out(calculating is easy…), to what extent the loss of brightness is disturbing him or her.
Same focal length: The(U)WA eyepiece shows a larger section of the sky; magnification and exit pupil, i.e. brightness, are the same. The advantage of the(U)WA is a larger sky section, so you do not have to"push" your Dobsonian or other"hand-operated" telescope as often.
Magnification 23 x 30 x 15- 45 x 30 x 40 x 20- 60 x Focal length(mm) 16.7 12.8 25.1- 8.4 16.7 12.8 25.1- 8.4 Field of view at 1000 m(m) 52 40 56- 26 40 30 43-20 Exit pupil(mm) 2.8 2.1 4.3- 1.4 2.8 2.1 4.3- 1.4 Diameter(mm) 48 48 56 48 48 56 Length(mm) 87 77 99 87 77 99 Weight(g) 230 230 330 230 230 330 Order numbers 52 80 18 52 80 19 52 80 20 52 80 18 52 80 19 52 80 20.