Celestron The G-8 11023 Instruction Manual Download Page 3

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ii • Table of Contents

Polar Alignment ............................................................................................................................. 31
Finding the Pole ............................................................................................................................ 32

Latitude Scales ................................................................................................................ 33
Pointing at Polaris ............................................................................................................ 34
Declination Drift ................................................................................................................ 35
Polar Alignment Finders ................................................................................................... 36
Aligning the R.A. Setting Circle ........................................................................................ 36

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CELESTIAL OBSERVING ................................................................................................................... 37

Observing the Moon ...................................................................................................................... 37
Observing the Planets ................................................................................................................... 37
Observing the Sun ......................................................................................................................... 38
Observing Deep-Sky Objects ......................................................................................................... 39

Using the Setting Circles .................................................................................................. 39
Star Hopping .................................................................................................................... 40

Viewing Conditions ........................................................................................................................ 42

Transparency .................................................................................................................... 42
Sky Illumination ................................................................................................................ 42
Seeing .............................................................................................................................. 42

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CELESTIAL PHOTOGRAPHY ............................................................................................................. 44

Short Exposure Prime Focus ........................................................................................................ 45
Piggyback ..................................................................................................................................... 47
Eyepiece Projection ...................................................................................................................... 49
Long Exposure Prime Focus ......................................................................................................... 51
CCD Imaging ................................................................................................................................. 53
Description of F-Numbers ......................................................................................................... 54
Imaging at f/1.95 ...................................................................................................................... 55
Imaging at f/6.3 ........................................................................................................................ 55
Imaging at f/10 ......................................................................................................................... 55
Imaging at f/20 ......................................................................................................................... 56

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TELESCOPE MAINTENANCE .............................................................................................................. 57

Care and Cleaning of the Optics .................................................................................................... 57
Collimation .................................................................................................................................... 57

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OPTIONAL ACCESSORIES ................................................................................................................. 59

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THE MESSIER CATALOG .................................................................................................................... 64

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LIST OF BRIGHT STARS .................................................................................................................... 67

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FOR FURTHER READING .................................................................................................................... 68