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APPENDIX A - TECHNICAL SPECIFICATIONS
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NexStar 60mm NexStar 80mm NexStar 102mm NexStar 114mm NexStar 130mm
Design Refractor Refractor Refractor Reflector Reflector
Aperture 60mm 80mm 102mm 114mm 130mm
Focal Length 700mm 900mm 660mm 1000mm 650mm
F/ratio of the Optical System 12 11 6.5 9 5
Optical Coatings Fully Coated Fully Coated Multi Coated Aluminum Aluminum
Highest Useful Magnification 175x 189x 240x 269x 306x
Resolution: Rayleigh Criterion
Dawes Limit
2.31 arc seconds
1.93 arc seconds
1.73 arc seconds
1.45 arc seconds
1.36 arc seconds
1.14 arc seconds
1.21 arc seconds
1.02 arc seconds
1.06 arc seconds
.89 arc seconds
Light Gathering Power 73x unaided eye 131x unaided eye 212x unaided eye 265x unaided eye 345x unaided eye
Field of View: Standard Eyepiece 1.6º 1.3º 1.7º 1.1º 1.7º
Linear Field of View (at 1000
yds)
84feet 66 feet 91 feet 59 feet 91 feet
Eyepiece Magnification: 28x (25mm)
78x (9mm)
36x (25mm)
100x (9mm)
26x (25mm)
73x (9mm)
40x (25mm)
111x (9mm)
26x (25mm)
62x (9mm)
Optical Tube Length 28 inches 34 inches 23 inches 19 inches 21 inches
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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
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Software Precision 16 bit, 20 arc sec. calculations
Ports RS-232 communication port on hand control
Tracking Rates Sidereal, Solar and Lunar
Tracking Modes Alt-Az, EQ North & EQ South
Alignment Procedures Sky Align, Auto 2-Star, 2-Star, One-Star, Solar System Align
Database 99 user defined programmable object.
Expanded information on over 100 objects
Total Object Database 4,033 Objects