42
A
A
p
p
p
p
e
e
n
n
d
d
i
i
x
x
A
A
-
-
T
T
e
e
c
c
h
h
n
n
i
i
c
c
a
a
l
l
S
S
p
p
e
e
c
c
i
i
f
f
i
i
c
c
a
a
t
t
i
i
o
o
n
n
s
s
Optical Specification
Design Schmidt-Cassegrain Catadioptric
Aperture 8 inches (203.2mm)
Focal Length 80 inches (2032mm)
F/ratio of the Optical System 10
Primary Mirror: Material
Coatings
Fine Annealed Pyrex
Starbright Coatings - 5 step multilayer process
Secondary Mirror: Material
Coatings
Hand Figured Fine Annealed Pyrex
Starbright Coatings - 5 step multilayer process
Central Obstruction 2.75”
Corrector Plate: Material
Coatings
Optical Quality Crown Glass
A-R Coatings both sides
Highest Useful Magnification 480x ( ~ 4mm eyepiece)
Lowest Useful Magnification (7mm exit pupil) 29x ( ~ 70mm eyepiece)
( ~ 44mm eyepiece with optional Reducer Corrector)
Resolution: Rayleigh Criterion
Dawes Limit
.68 arc seconds
.57arc seconds
Photographic Resolution 182 lines/mm
Light Gathering Power 843x unaided eye
Near Focus standard eyepiece or camera ~ 25 feet
Field of View: Standard Eyepiece
: 35mm Camera
.92º
1.0º x .68º (1.6º x 1.07º - with optional Reducer Corrector)
Linear Field of View (at 1000 yds) 54 feet
Magnification: Standard Eyepiece
: Camera
50x
25x
Optical Tube Length 16 inches
Weight of Telescope 24 Lbs.
Electronic Specifications
Input Voltage
Maximum
Minimum
12 V DC Nominal
18 V DC Max.
8 V DC Min.
Batteries Required 8 AA Alkaline
Power Supply Requirements 12 VDC-750 mA (Tip positive)
Mechanical Specifications
Motor: Type
Resolution
DC Servo motors with encoders, both axes
.26 arc sec
Slew speeds Nine slew speeds: 6.5º /sec, 3º /sec, 1.5º/sec, 128x, 64x, 16x, 8x, 2x, 1x
Hand Control
Double line, 16 character Liquid Crystal Display
19 fiber optic backlit LED buttons
Fork Arm Cast aluminum, with integrated hand control receptacle
Software Specifications
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 2-Star Alignment, AutoAlign
Database 18,000+ objects
25 user defined programmable objects.
9 user defined programmable longitudes and latitudes.
Enhanced information on over 100 objects
Complete Revised NGC Catalog 7,840
Complete Messier Catalog 110
Complete Caldwell 109
Solar System objects 9
Famous Asterisms 20
Selected SAO Stars 10,385
Total Object Database 18,473
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