Celestron 31058, 31056 instruction manual B L E N T E N T S

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T A B L E

O F

C O N T E N T S

 

INTRODUCTION

 

5

How to Use This Manual

 

6

A Word of Caution

 

6

The Newtonian Optical System

 

7

ASSEMBLING YOUR NEWTONIAN

 

8

Unpacking Your Telescope

 

8

Setting Up the Tripod

 

11

Adjusting the Tripod Height

 

11

Attaching the Accessory Tray

 

12

Attaching the Equatorial Mount

 

13

Attaching the R.A. Slow Motion Knob

14

Attaching the Declination Slow Motion Knob

15

Installing the Counterweight Bar & Counterweights

16

Attaching the Telescope to the Mount

 

17

Balancing the Telescope in R.A

19

Balancing the Telescope in DEC

20

Adjusting the Mount in Altitude

 

21

Adjusting the Mount in Azimuth

 

21

Disassembling and Transporting Your G-8N

22

Storing Your Telescope

 

22

Installing the Finderscope

 

23

Installing the Eyepiece

 

24

Technical Specifications

 

25

TELESCOPE BASICS

 

26

Image Orientation

 

26

Focusing

 

27

Aligning the Finder

 

28

Your First Look

 

29

Daytime Observing

 

29

Nighttime Observing

 

30

Calculating Magnification (Power)

 

31

Determining the Field of View

 

31

ASTRONOMY BASICS

 

32

The Celestial Coordinate System

 

32

Motion of the Stars

 

33

Polar Alignment

 

34

Finding the Pole

 

35

Latitude Scales

 

36

Pointing at Polaris

 

37

Declination Drift

 

38

Polar Axis Finder

 

39

Aligning the R.A. Setting Circle

 

39

CELESTIAL OBSERVING

 

40

Table of Contents • i

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Contents C150-HD and G-8N Newtonian Page B L E N T E N T S Celestial Photography T R O D U C T I O N How to Use this Manual Word of Caution Newtonian Optical System Unpacking Your G-8N S E M B L I N G Y O U R N E W T O N I a N T E L E S C O P EG-8N C150-HD Adjusting the Tripod Height Setting Up the TripodAttaching the Accessory Tray They are needed later for polar alignment Attaching the Equatorial MountAttaching the R.A. Slow Motion Knob Attaching the Declination Slow Motion Knob Attaching the Counterweight Bar and Counterweight Attaching the Telescope to the Mount For G-8N Attaching the Telescope to the Mount For C150- HD Balancing the Telescope in R.A Removing the Lens CapCompletely Balancing the Telescope in DECG-8N C150-HD Installing the Finderscope Installing the Eye- piece Technical Specifications ActualVeiw NewtonianView Image OrientationFocusing Aligning the Finder Daytime Observing Your First LookNighttime Observing Calculating Magnification Determining Field of View Celestial Coordi- nate System T R O N O M Y B a S I C SMotion of the Stars Definition Polar AlignmentFinding the Pole Latitude Scales Pointing at Polaris Declination Drift Polar Alignment Finders Aligning the R.A Setting CircleObserving the Moon Planets L E S T I a L O B S E R V I N GObserving Deep-Sky Objects Observing the S u nUsing the Setting Circles Star Hopping Celestial Observing Seeing Viewing ConditionsTransparency Sky IlluminationCelestial Observing L E S T I a L P H O T O G R a P H Y Short Exposure Prime F o c u s Lunar Phase ISO Crescent Quarter 125 Full 250Piggyback Celestial Photography L E S C O P E M a I N T E N a N C E Care and Cleaning of the Optics CollimationOr back out the holder screws more than one 1 to two 2 turns T I O N a L a C C E S S O R I E S Optional Accessories Single Axis Motor Drive System #93518 Themessiercatalog Great Orion Nebula Elliptical Galaxy List of Bright Stars For Further Reading Celestron ONE Year Warranty