Celestron NexStar 4SE Computerized Telescope NexStar 4 SE Manual - Page 40

Appendix A - Technical Specifications, SkyAlign, Auto Two-Star, Two-Star, One-Star, Solar System Align

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Appendix A - Technical Specifications OOppttiiccaall SSppeecciiffiiccaattiioonn Design Aperture Focal Length F/ratio of the Optical System Primary Mirror: Diameter Coatings Secondary Mirror Spot Size Secondary Obstruction Corrector Plate: Material Coatings Highest Useful Magnification Lowest Useful Magnification (7mm exit pupil) Resolution: Rayleigh Criterion Dawes Limit Photographic Resolution Light Gathering Power Near Focus standard eyepiece or camera Field of View: Standard Eyepiece : 35mm Camera Linear Field of View (at 1000 yds) Magnification: Standard Eyepiece : Camera Optical Tube Length Weight of Telescope Weight of Tripod Maksutov-Cassegrain Catadioptric 4 inches (102mm) 52 inches (1325mm) 13 102mm Multi-layer coating process 1.25" 34.4% by diameter; 11% by area BK-7 Optical Glass Starbright XLT® 240x ( ~ 6mm eyepiece) 15x ( ~ 80mm eyepiece) 1.36 arc seconds 1.14 arc seconds 140 lines/mm 212x unaided eye ~ 20 feet 1.1º 1.51º x 1.04º 52.5 feet 53x 27x 13.5 inches 11 Lbs. 10 lbs EElleeccttrroonniicc SSppeecciiffiiccaattiioonnss Input Voltage 12 V DC Nominal Batteries Required Power Supply Requirements 8 AA Alkaline 12 VDC-750 mA (Tip positive) MMeecchhaanniiccaall SSppeecciiffiiccaattiioonnss 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 SSooffttwwaarree SSppeecciiffiiccaattiioonnss Software Precision Ports Tracking Rates Tracking Modes Alignment Procedures Database Total Object Database 16 bit, 20 arc sec. calculations RS-232 communication port on hand control Sidereal, Solar, Lunar and King Alt-Az, EQ North & EQ South SkyAlign, Auto Two-Star, Two-Star, One-Star, Solar System Align 25 user defined programmable object. Enhanced information on over 100 objects 38,181

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Appendix A - Technical Specifications
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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
Coatings
102mm
Multi-layer coating process
Secondary Mirror Spot Size
Secondary
Obstruction
1.25"
34.4% by diameter;
11% by area
Corrector Plate:
Material
Coatings
BK-7 Optical Glass
Starbright XLT®
Highest Useful Magnification
240x
( ~ 6mm eyepiece)
Lowest Useful Magnification (7mm exit pupil)
15x
( ~ 80mm eyepiece)
Resolution:
Rayleigh Criterion
Dawes Limit
1.36 arc seconds
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
: 35mm Camera
1.1º
1.51º x 1.04º
Linear Field of View (at 1000 yds)
52.5 feet
Magnification: Standard Eyepiece
: Camera
53x
27x
Optical Tube Length
13.5 inches
Weight of Telescope
11 Lbs.
Weight of Tripod
10 lbs
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Input Voltage
12 V DC Nominal
Batteries Required
8 AA Alkaline
Power Supply Requirements
12 VDC-750 mA (Tip positive)
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Motor: Type
Resolution
DC Servo motors with encoders, both axes
.26 arc sec
Slew speeds
Nine slew speeds: 4º /sec, 2º /sec,
1º/sec, .5/sec, 32x, 16x, 8x, 4x, 2x
Hand Control
Double line, 16 character Liquid Crystal Display
19 fiber optic backlit LED buttons
Fork Arm
Cast aluminum, with integrated
hand control receptacle
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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