Celestron 11055 Instruction Manual page 4

USING THE DRIVE ............................................................................................................................. 37
Powering Up the Drive ......................................................................................................................37
Guide Speed ....................................................................................................................................38
Tracking Rate Selection.................................................................................................................... 38
BC -Backlash Correction ..................................................................................................................39
Periodic Error Correction ..................................................................................................................39
HC/CCD ...........................................................................................................................................40
12 V DC ...........................................................................................................................................40
Northern/Southern Hemisphere Operation ......................................................................................... 41
Using the Hand Controller ................................................................................................................. 41
R.A./DEC Reverse ............................................................................................................................42
Autoguiding ...................................................................................................................................... 42
CELESTIAL OBSERVING ...................................................................................................................43
Observing the Moon .......................................................................................................................... 43
Observing the Planets ......................................................................................................................43
Observing the Sun ............................................................................................................................44
Observing Deep-Sky Objects ............................................................................................................45
Using the Setting Circles ........................................................................................................... 45
Star Hopping ..............................................................................................................................46
Viewing Conditions ...........................................................................................................................48
Transparency ............................................................................................................................. 48
Sky Illumination .........................................................................................................................48
Seeing .......................................................................................................................................48
CELESTIAL PHOTOGRAPHY .............................................................................................................50
Short Exposure Prime Focus ........................................................................................................... 51
Piggyback ........................................................................................................................................53
Eyepiece Projection .........................................................................................................................55
Long Exposure Prime Focus ............................................................................................................57
CCD Imaging ....................................................................................................................................59
Description of F-Numbers ............................................................................................................60
Fastar Configuration ...................................................................................................................60
Imaging at f/2.1 .......................................................................................................................... 61
Imaging at f/7 ............................................................................................................................. 61
Imaging at f/11 ...........................................................................................................................61
Imaging at f/22 ...........................................................................................................................62
TELESCOPE MAINTENANCE .............................................................................................................63
Care and Cleaning of the Optics .......................................................................................................63
Collimation .......................................................................................................................................63
OPTIONAL ACCESSORIES ................................................................................................................66
THE MESSIER CATALOG ..................................................................................................................70
LIST OF BRIGHT STARS ...................................................................................................................73
FOR FURTHER READING ...................................................................................................................74
iv • Table of Contents