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Celestron C100ED-R, C80ED-R Appendix A – Technical Specifications, Advanced Series, 21021, 21026

Models: C100ED-R C80ED-R

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Appendix A – Technical Specifications

Advanced Series	21021 / 21022			21026 / 21027

Specifications:
Optical Design	80mm (3.2") refractor			100mm (4") refractor
Focal Length	600mm F/7.5			900mm F/9
Finderscope		6x30		9x50
Mount	CG-5 Equatorial			CG-5 Equatorial
Eyepiece	20mm – 1.25" (30x)			20mm – 1.25" (45x)
Accessory tray		Yes		Yes
Tripod	2" Stainless Steel			2" Stainless Steel
Technical Specs
Highest Useful Magnification		189x		236x
Lowest Useful Magnification		11x		14x
Limiting Stellar Magnitude	12			12.5
Resolution: Rayleigh	1.73 arc seconds			1.38 arc seconds
Dawes Limit	1.45 arc seconds			1.16 arc seconds
Light Gathering Power	131x unaided eye			204x unaided eye
Field of View: standard eyepiece	1.67º			1.3º
Linear FOV (@1000 yds)		87.5 ft		70 ft
Optical Coatings - Standard	Fully Multi-Coated			Fully Multi-Coated
Optical tube length	23"			34"
Telescope Weight		42 lbs		50 lbs

Advanced GT

Additional Specifications
Hand Control		Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons
Motor: Type		DC Servo motors with encoders, both axes
Max Slew Speed		3º/second
Software Precision		24bit, 0.08 arc sec calculation
Hand Control Ports		RS-232 communication port on hand control
Motor Ports		Aux Port, Autoguide Ports
Tracking Rates		Sidereal, Solar and		Lunar
Tracking Modes		EQ North & EQ South
Alignment Procedures		AutoAlign, 3-Star Alignment, Quick Align, Last Align
Database		40,000+ objects, 400 user defined programmable objects.
Database		Enhanced information on over 200 objects
Complete Revised NGC Catalog		7,840
Complete Messier Catalog		110
Complete IC Catalog		5,386
Complete Caldwell		109
Abell Galaxies		2,712
Solar System objects		9
Famous Asterisms		20
Selected CCD Imaging Objects		25
Selected SAO Stars		29,500
Total Object Database		45,492

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Celestron C100ED-R, C80ED-R manual Appendix A – Technical Specifications, Advanced Series, 21021, 21026, Advanced GT

Contents

Advanced Series Advanced Series GT C80ED-R C100ED-RINSTRUCTION MANUAL INTRODUCTION Light Control Many other high performance features Fig 1-2- The Advanced GT Series Attaching the Equatorial Mount Setting up the TripodAttaching the Center Leg Brace Installing the Counterweight BarFor Non-GTModels Only Installing the CounterweightAttaching the Hand Control Holder Advanced GT Models OnlyAttaching the Telescope Tube to the Mount Figure Installing the FinderscopeThe Optical Tube Figure Installing the EyepiecesBalancing the Tube in R.A Figure Adjusting the MountBalancing the Telescope in DEC OF THE TELESCOPE TUBE COMPLETELYAdjusting the Mount in Azimuth Adjusting the Mount in AltitudePowering the Telescope Figure The Advanced GT Hand Control 1 7 2 8 3 9 4Double Stars Hand Control OperationNamed Stars Named ObjectsStartup Procedure Alignment ProceduresAuto Three-StarAlign Auto AlignRe-Alignment Quick-AlignLast Alignment Finding Planets Object CatalogSelecting an Object Slewing to an ObjectRate Button Tour ModeConstellation Tour Direction Buttons2º / sec Setup Proceduressidereal = .5º / secIdentify Precise GoTo Scope Setup Featuresexample, if you are observing from a mountainous location where the horizon is partially obscured, you can set your minimum altitude limit to read +20º. This will make sure that the hand control only displays objects that are higher in altitude than 20º Utility Features Helpful Hint LIST ADVANCED GTMENU ALIGNMENTwith the unaided eye Image OrientationFigure Actual image orientation as seenCalculating Magnification FocusingAligning the Finderscope General Observing Hints Determining Field of ViewFigure The Celestial Coordinate SystemMotion of the Stars Pointing at Polaris Latitude ScalesDefinition Finding the North Celestial PoleDeclination Drift Method of Polar Alignment Observing the Sun Observing the MoonLunar Observing Hints Observing the PlanetsTransparency Solar Observing HintsObserving Deep Sky Objects Seeing ConditionsSeeing conditions directly affect image quality. These drawings represent a point source i.e., star under bad seeing conditions left to excellent conditions right. Most often, seeing conditions produce images that lie some where between these two extremes Piggyback Short Exposure Prime Focus Photography Lunar Phase Terrestrial PhotographyMetering Reducing VibrationAuto Guiding Care and Cleaning of the Optics 40mm Page 21026 / Appendix A – Technical SpecificationsAdvanced Series 21021 /Appendix B - Glossary of Terms Page Page APPENDIX C LONGITUDES AND LATITUDES LONGITUDE LONGITUDE LONGITUDE INTERNATIONAL CANADACommands below available on version 2.2 or later Appendix D - RS-232ConnectionPC Command ASCII Commands below available on version 1.6 or laterReset 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 Item # 21021-INSTPrinted in China $10.00 CelestronCopyright 2003 Celestron All rights reserved