Celestron C8-S User Manual
Page 3
3
Autoguide Rates ...............................................................................................................................................26
Azimuth Limits.................................................................................................................................................26
East/West Filtering ...........................................................................................................................................27
Utility Features .........................................................................................................................................................27
Calibrate Goto ..................................................................................................................................................27
Home Position ..................................................................................................................................................27
Polar Align .......................................................................................................................................................27
Light Control ....................................................................................................................................................28
Factory Settings................................................................................................................................................28
Version .............................................................................................................................................................28
Get Alt-Az ........................................................................................................................................................28
Goto Alt-Az......................................................................................................................................................28
Hibernate ..........................................................................................................................................................28
Turn On/Off GPS .............................................................................................................................................28
ASTRONOMY BASICS ............................................................................................................................................................... 30
The Celestial Coordinate System..............................................................................................................................30
Motion of the Stars ...................................................................................................................................................31
Finding the North Celestial Pole...............................................................................................................................33
Declination Drift Method of Polar Alignment..........................................................................................................34
CELESTIAL OBSERVING ......................................................................................................................................................... 35
Observing the Moon .................................................................................................................................................35
Lunar Observing Hints .............................................................................................................................................35
Observing the Planets ...............................................................................................................................................35
Observing the Sun ....................................................................................................................................................35
Solar Observing Hints ..............................................................................................................................................36
Observing Deep Sky Objects....................................................................................................................................36
Seeing Conditions.....................................................................................................................................................36
Transparency ............................................................................................................................................................36
Sky Illumination .......................................................................................................................................................36
Seeing .......................................................................................................................................................................36
ASTROPHOTOGRAPHY............................................................................................................................................................ 38
Short Exposure Prime Focus Photography ...............................................................................................................38
Eyepiece Projection ..................................................................................................................................................39
Long Exposure Prime Focus Photography ...............................................................................................................40
Terrestrial Photography ............................................................................................................................................42
Metering ...................................................................................................................................................................42
Reducing Vibration...................................................................................................................................................42
CCD Imaging............................................................................................................................................................42
Auto Guiding ............................................................................................................................................................43
TELESCOPE MAINTENANCE.................................................................................................................................................. 44
Care and Cleaning of the Optics...............................................................................................................................44
Collimation ...............................................................................................................................................................44
OPTIONAL ACCESSORIES ..................................................................................................................................................... 46
APPENDIX A – TECHNICAL SPECIFICATIONS................................................................................................................ 49
APPENDIX B – GLOSSARY OF TERMS ................................................................................................................................ 50
APPENDIX C – LONGITUDES AND LATITUDES................................................................................................................. 53
APPENDIX D – RS-232 CONNECTION .................................................................................................................................... 58
APPENDIX E – TIME ZONE MAP ............................................................................................................................................ 60
SKY MAPS .................................................................................................................................................................................... 62