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Eyepiece Binorum Kellner 10mm 50° 1,25″
Article No.:
77350
Manufactured by:
Binorum
Shipping weight:
0.07 kg
Our price:
24.50 €
On order - more than a month
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Watch availability - Eyepiece Binorum Kellner 10mm 50° 1,25″
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These are goods that we do not have in stock and which are not currently in stock even with the supplier. Usually in this case we do not even know the date of stocking at the supplier, so the goods may be unavailable for a longer period of time.
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This product is available in the following variants:
Binorum Kellner 6mm 50° 1,25″ Eyepiece
24.30 €
Eyepiece Binorum Kellner 10mm 50° 1,25″
24.50 €
Binorum Kellner 15mm 50° 1.25″ Eyepiece
24.95 €
Binorum Kellner 20mm 50° 1.25″ Eyepiece
25.15 €
Binorum Kellner 25mm 50° 1.25″ Eyepiece
25.15 €
Specifications
Type of eyepiece:
Kellner
Focal length:
10 mm
Connection type:
1.25″
Apparent field of view:
50°
Telescope parameters using this eyepiece
Aperture
mm
Focal length telescope
mm
Specifications:
Magnification:
Telescope magnification
is calculated by dividing the telescope's focal length by the eyepiece focal length. A Barlow lens also affects magnification: the power increases according to the Barlow's multiplication factor.
Field of View:
The field of view
is the angular size of the sky area visible through the telescope with a given eyepiece. It depends on both the magnification and the eyepiece's apparent field of view. For comparison, the Moon's average apparent diameter is 0° 31' 5" (0.518°).
Exit Pupil:
The exit pupil
is the diameter of the light beam that exits the eyepiece and enters your eye. A larger exit pupil produces a brighter image. Exit pupil is calculated by dividing the aperture diameter by the magnification.
Focal Ratio:
The focal ratio
(also called f-number or f-stop) is the ratio of the telescope's focal length to its aperture diameter. Telescopes with focal ratios from f/4 to f/6 are typically called "fast" telescopes, suitable for both visual observation and astrophotography. Telescopes with focal ratios between f/6 and f/15 are better suited for visual observation than photography, and generally make it easier to achieve higher magnifications.
Resolution (Dawes Limit):
Resolution
is the angular size of the smallest details and objects that can be distinguished through this telescope under excellent observing conditions. This theoretical limit assumes perfect optics and atmospheric conditions.
Limiting Magnitude:
This is the faintest star magnitude visible through this telescope under excellent observing conditions with dark, clear skies and a fully dark-adapted eye.
Magnification with this eyepiece
Focal length, mm
330
360
400
420
450
480
500
600
650
660
700
750
770
800
Magnification
33x
36x
40x
42x
45x
48x
50x
60x
65x
66x
70x
75x
77x
80x
Focal length, mm
880
900
920
1000
1200
1250
1400
1500
1800
2000
2350
2800
3000
3910
Magnification
88x
90x
92x
100x
120x
125x
140x
150x
180x
200x
235x
280x
300x
391x
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