Celestron C8 Handleiding

Celestron Niet gecategoriseerd C8

Lees hieronder de 📖 handleiding in het Nederlandse voor Celestron C8 (12 pagina's) in de categorie Niet gecategoriseerd. Deze handleiding was nuttig voor 23 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld

Pagina 1/12
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Figure 1-1
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A telescope is an instrument that collects and focuses light. The nature of the optical design determines how the light is focused.
Some telescopes, known as refractors, use lenses. Other telescopes, known as reflectors, use mirrors. The Schmidt-Cassegrain
optical system (or Schmidt-Cass for short) uses a combination of mirrors and lenses and is referred to as a compound or
catadioptric telescope. This unique design offers large-diameter optics while maintaining very short tube lengths, making them
extremely portable. The Schmidt-Cassegrain system consists of a zero power corrector plate, a spherical primary mirror, and a
secondary mirror. Once light rays enter the optical system, they travel the length of the optical tube three times.
The optics of the Celestron Schmidt-Cassegrain telescopes have Starbright® coatings - enhanced multi-layer coatings on the
primary and secondary mirrors for increased reflectivity and a fully coated corrector for the finest anti-reflection characteristics.
8” OTA 8” OTA-CF 9.25” OTA 9.25” OTA-CF 11" OTA 11" OTA-CF 14" OTA 14" OTA
Part Number 91024 91023 91027 91026 91036 91035 91037 91038-XLT
Focal Length 2032mm F/10 2032mm F/10 2350mm F/10 2350mm F/10 2800mm F/102800mm F/10 3910mm
F/11 3910mm
F/11
Eyepiece 25mm –
1.25" (81x) 25mm - 1.25"
(81x) 25mm - 1.25"
(94x) 25mm - 1.25"
(94x) 40mm -
1.25" (70x) 40mm - 1.25"
(70x) 40mm - 2"
(98x) 40mm - 2"
(98x)
Star Diagonal 90° - 1.25" 90° - 1.25" 90° - 1.25" 90° - 1.25" 90° - 1.25" 90° - 1.25" 90° - 2" 90° - 2"
Finderscope 6x30 6x30 6x30 6x30 9x50 9x50 9x50 9x50
Optical Tube Aluminum Carbon Fiber Aluminum Carbon Fiber Aluminum Carbon Fiber Aluminum Aluminum
Fastar
Compatible
No Yes
N
o No
N
o No
N
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The visual back is the accessory that allows you to attach all visual accessories to the telescope. The 8", 9.25" and
11" optical tubes come with the visual back installed. The 14" OTA comes with a thread on 2" star diagonal instead
of a visual back. If it is not already on the tube it can be attached as follows:
1. Remove the rubber cover on the rear cell.
2. Place the knurled slip ring on the visual back over the threads on the rear cell (Fig 1-2).
3. Hold the visual back with the set screw in a convenient position and rotate the knurled slip ring clockwise until tight.
3
Once this is done, you are ready to attach other accessories, such as eyepieces, diagonal prisms, etc.
If you want to remove the visual back, rotate the slip ring counterclockwise until it is free of the rear cell.
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The star diagonal is a prism that diverts the light at a right angle to the light path of the telescope. This allows you
to observe in positions that are physically more comfortable than if you looked straight through.
To attach the star diagonal onto the 8", 9.25" and 11" optical tubes:
1. Turn the set screw on the visual back until its tip no longer extends into (i.e., obstructs) the inner diameter of the
visual back.
2. Slide the chrome portion of the star diagonal into the visual back.
3. Tighten the set screw on the visual back to hold the star diagonal in place.
The 14" OTA comes with a 2" mirror diagonal that attaches directly onto the rear threads of the optical tube. See
figure 1-3.
If you wish to change the orientation of the star diagonal, loosen the set screw on the visual back until the star
diagonal rotates freely. Rotate the diagonal to the desired position and tighten the set screw.
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The eyepiece, or ocular, is an optical element that magnifies the image focused by the telescope. The eyepiece fits
into either the visual back directly or the star diagonal. To install an eyepiece:
1. Loosen the set screw on the star diagonal until the tip no longer extends into the inner diameter of the
eyepiece end of the diagonal.
2. Slide the chrome portion of the eyepiece into the star diagonal.
Eyepiece
Star Diagonal
Visual Back
Figure 1-2 – 8", 9.25" and
11" Rear Cell Figure 1-3 – 14" Rear Cell
2" thread-on
Mirror Diagonal
2" Barrel
Eyepiece

Product specificaties

Merk: Celestron
Categorie: Niet gecategoriseerd
Model: C8

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