Celestron 4SE Appendix A - Technical Specifications, Optical, Electronic Specifications

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Appendix A - Technical Specifications

Appendix A - Technical Specifications

Optical		Specification
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Design					Maksutov-Cassegrain Catadioptric
Aperture					4 inches (102mm)
Focal Length					52 inches (1325mm)
F/ratio of the Optical System					13
Primary Mirror:			Diameter		102mm
			Coatings		Multi-layer coating process
Secondary Mirror Spot Size					1.25"
Secondary Obstruction					34.4% by diameter; 11% by area
Corrector Plate:			Material		BK-7 Optical Glass
			Coatings		Starbright XLT®
Highest Useful Magnification					240x	( ~ 6mm eyepiece)
Lowest Useful Magnification (7mm exit pupil)					15x	( ~ 80mm eyepiece)
Resolution: Rayleigh Criterion					1.36 arc seconds
		Dawes Limit			1.14 arc seconds
Photographic Resolution					140 lines/mm
Light Gathering Power					212x unaided eye
Near Focus standard eyepiece or camera					~ 20 feet
Field of View: Standard Eyepiece					1.1º
		: 35mm Camera			1.51º x 1.04º
Linear Field of View (at 1000 yds)					52.5 feet
Magnification: Standard Eyepiece					53x
		: Camera			27x
Optical Tube Length					13.5 inches
Weight of Telescope					11 Lbs.
Weight of Tripod					10 lbs
Electronic Specifications
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Input Voltage					12 V DC Nominal

Batteries Required					8 AA Alkaline
Power Supply Requirements					12 VDC-750 mA (Tip positive)

Mechaniicall Speciifiicatiions

Motor: Type Resolution

Slew speeds

Hand Control

Fork Arm

DC Servo motors with encoders, both axes

.26 arc sec

Nine slew speeds: 4º /sec, 2º /sec, 1º/sec, .5/sec, 32x, 16x, 8x, 4x, 2x

Double line, 16 character Liquid Crystal Display 19 fiber optic backlit LED buttons

Cast aluminum, with integrated hand control receptacle

Software Specifications
i i	i
Software Precision		16 bit, 20 arc sec. calculations
Ports		RS-232 communication port on hand control
Tracking Rates		Sidereal, Solar, Lunar and King
Tracking Modes		Alt-Az, EQ North & EQ South
Alignment Procedures		SkyAlign, Auto Two-Star, Two-Star, One-Star, Solar System Align
Database		25 user defined programmable object.
		Enhanced information on over 100 objects

Total Object Database		38,181

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Contents INSTRUCTION MANUAL INTRODUCTION ASSEMBLYHAND CONTROL Hand Control Command Tree TELESCOPE MAINTENANCEAPPENDIX A - TECHNICAL SPECIFICATIONS TELESCOPE BASICSSome of the many standard features of the NexStar include Battery Compartment Accessory Tray / Leg BraceON/OFF Switch NexStar 4 SEPowering the NexStar Assembling the NexStarThe Hand Control Star Pointer Installation Figure 3-2 - The Rear Cell with Visual AccessoriesThe Eyepiece EyepieceStarPointer DiagonalStar Pointer Operation Removing the Optical TubeFigure 3-3 The Star Pointer Finderscope with Mounting Bracket Quick Release KnobAttaching the NexStar to the Tripod The NexStar Hand Control Hand Control Operation Alignment ProcedureDefinition Named StarsSky Align HintsTips for Using Sky Align Auto Two-Star AlignTwo Star Alignment Helpful HintOne-Star Align Solar System AlignTips for Using Solar System Align EQ North / EQ South AlignmentEQ AutoAlign Improving Pointing Accuracy EQ Two-Star AlignEQ One-Star Align EQ Solar System AlignObject Catalog SyncUndo Sync Selecting an ObjectSlewing to an Object Finding PlanetsTour Mode Constellation TourSetup Procedures Direction ButtonsNine available slew speeds Rate ButtonConnecting a Camera to the NexStar Mount CameraSave Database Db Camera Wizard Controlling your CameraObject Type Identify Scope Setup FeaturesPrecise GoTo MENU Utility Features HelpfulHint Sun MenuSet Mount Position NexStar SE ALIGNMENTLIST NexStar Menu TreeImage Orientation Fig 5-2a - Actual image orientation as seen with the unaided eyeFig 5-2b - Reversed from left to right, as viewed through the eyepieceCalculating Magnification FocusingDetermining Field of View General Observing Hints The Celestial Coordinate System The celestial sphere seen from the outside showing R.A. and DECMotion of the Stars Polar Alignment Aligning the NexStar 4 on a WedgeWedge Align moves in right ascension and declinationAttaching a Camera to the NexStar Photography with the NexStarThe position of the Big Dipper changes throughout Finding the North Celestial Polethe year and the night Observing the Moon Observing the PlanetsObserving the Sun Lunar Observing HintsObserving Deep Sky Objects Seeing ConditionsSolar Observing Hints TransparencyCare and Cleaning of the Optics Page Page Appendix A - Technical Specifications SpecificationElectronic Specifications Software SpecificationsAppendix B - Glossary of Terms Page Appendix C - RS-232 Connection Appendix D - Maps of Time Zones Page Page Page Page Page Page Page CELESTRON TWO YEAR WARRANTY Celestron 2835 Columbia Street Torrance, CA Tel. 310 Fax. 310 Copyright 2006 Celestron All rights reservedProducts or instructions may change without notice or obligation #11049-INST Printed in China $10.00