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Celestron C8 User Manual

Celestron C8
82 pages
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Table of Contents

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Celestron C8 Specifications

General IconGeneral
Optical DesignSchmidt-Cassegrain
Aperture203.2 mm (8 in)
Focal Length2032 mm (80 in)
Focal Ratiof/10
Optical CoatingsStarBright XLT
Finderscope6x30
Highest Useful Magnification480x
Lowest Useful Magnification29x
Limiting Stellar Magnitude14
Resolution (Rayleigh)0.69 arc seconds
Resolution (Dawes)0.57 arc seconds
Secondary Mirror Obstruction64 mm
Secondary Mirror Obstruction by Diameter31%
Optical Tube Length432 mm (17 in)
Optical Tube Weight5.67 kg (12.5 lbs)
Light Gathering Power843x
Optical TubeAluminum
Eyepiece25 mm (81x)
Star Diagonal1.25"

Summary

CELESTRON C8 INSTRUCTION MANUAL

Assembling Your Ultima 8

Step-by-step guide for setting up the Ultima 8 telescope, including tripod, wedge, and finderscope.

Setting Up the Tripod

Instructions for properly setting up the Celestron field tripod for maximum stability and rigidity.

Attaching the Wedge to the Tripod

Procedure for securely attaching the telescope wedge to the tripod head using provided bolts.

Using the Drive and Controls

Periodic Error Correction

Detailed explanation of the PEC function for learning and improving telescope tracking accuracy.

Telescope Basics

Nighttime Observing

Steps for orienting the telescope and finding celestial objects for observation at night.

Astronomy Basics

Polar Alignment

Crucial process for aligning the telescope's axis with Earth's rotation for accurate tracking.

TELESCOPE MAINTENANCE

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