Celestron C8-NGT, C10-N manual Telescope Maintenance

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TELESCOPE BASICS	29
Image Orientation	29
Focusing	30
Aligning the Finderscope	30
Calculating Magnification	30
Determining Field of View	31
General Observing Hints	31
ASTRONOMY BASICS	32
The Celestial Coordinate System	32
Motion of the Stars	33
Finding the North Celestial Pole	35
Declination Drift Method of Polar Alignment	36
CELESTIAL OBSERVING	37
Observing the Moon	37
Lunar Observing Hints	37
Observing the Planets	37
Observing the Sun	37
Solar Observing Hints	38
Observing Deep Sky Objects	38
Seeing Conditions	38
Transparency	38
Sky Illumination	38
Seeing	38
ASTROPHOTOGRAPHY	40
Piggyback	40
Short Exposure Prime Focus Photography	41
Terrestrial Photography	42
Metering	42
Reducing Vibration	42
Auto Guiding	43
TELESCOPE MAINTENANCE	44
Care and Cleaning of the Optics	44
Collimation	44
OPTIONAL ACCESSORIES	48
APPENDIX A – TECHNICAL SPECIFICATIONS	51
APPENDIX B – GLOSSARY OF TERMS	52
APPENDIX C – LONGITUDES AND LATITUDES	55
APPENDIX D – RS-232 CONNECTION	60
APPENDIX E – TIME ZONE MAP	62
SKY MAPS	64

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Contents

Advanced Series Advanced Series GT Precise GoTo Scope Setup Features Telescope Maintenance Page Advanced Series Newtonian Advanced Series GT Newtonian Attaching the Equatorial Mount Setting up the TripodAttaching the Center Leg Brace Installing the Counterweight BarAttaching the Hand Control Holder Advanced GT Models Only Installing the CounterweightAttaching the Telescope Tube to the Mount Installing the Finderscope Installing the EyepiecesTelescope Telescope Tube Completely Balancing the Tube in R.AAdjusting the Mount in Altitude Adjusting the MountAttaching the Declination Cable For GT Models Only Powering the TelescopeAdvanced GT Hand Control Hand Control Operation Startup Procedure Alignment ProceduresAuto Three-Star Align Auto AlignQuick-Align Last AlignmentRe-Alignment Selecting an Object Object CatalogTour Mode Nine available slew speeds Setup ProceduresIdentify Scope Setup Features Observing Tip Helpful Hint Utility Features Helpful Hint Advanced GT Image Orientation Focusing Aligning the FinderscopeCalculating Magnification General Observing Hints Determining Field of ViewCelestial Coordinate System Motion of the Stars Pointing at Polaris Latitude ScalesFinding the North Celestial Pole Declination Drift Method of Polar Alignment Observing the Sun Observing the MoonLunar Observing Hints Observing the PlanetsTransparency Solar Observing HintsObserving Deep Sky Objects Seeing ConditionsPage Piggyback Short Exposure Prime Focus Photography Terrestrial Photography MeteringReducing Vibration Auto Guiding Care and Cleaning of the Optics CollimationAligning the Secondary Mirror Aligning the Primary Mirror Night Time Star Collimating Page Page Page Page Appendix a Technical Specifications Appendix B Glossary of Terms Page Eclipsing or obscuring the brightness of the star Appendix C Longitudes Latitudes Georgia Minnesota Rhode Island Canada Appendix D RS-232 Connection Reset The Position Of Azm Or Alt Additional RS232 CommandsAppendix E Maps of Time Zones Page Page Page Page Page Page Page Celestron TWO Year Warranty

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