37
Appendix A - Technical Specifications O
O
Op
p
pt
t
ti
i
ic
c
ca
a
al
l
lS
S
Sp
p
pe
e
ec
c
ci
i
if
f
fi
i
ic
c
ca
a
at
t
ti
i
io
o
on
n
n
Design Maksutov-Cassegrain Catadioptric
Aperture 4inches (102mm )
FocalLength 52inches (1325mm)
F/ratioof the Optical System 13
PrimaryMirror: Diameter
Coatings
102mm
Multi-layercoating process
SecondaryMirror Sp ot Size
Secondary Obstruction
1.25"
34.4%by diameter; 11%by area
CorrectorPlate: Material
Coatings
BK-7Optical Glass
A-RC oatings both side s
Highest Useful Magnification 240x (~ 6mm eyepiece)
LowestUseful Magnification (7mmexit pupil) 15x (~ 80mm eyepiece)
Resolution: Rayleigh Criterion
DawesLimit
1.36arc seconds
1.14arc seconds
Photographic Resolution 140lines/ mm
LightGath ering Power 212xunaid ed eye
NearFocus standard eyepiece or camera ~20 feet
Fieldof View: Standard Eyepiece
:35mmCamera
1.0º
1.51ºx 1.04º
LinearField of Vie w(a t 1000 yds) 52.5feet
Magnification: Standard Eyepiece
:Camera
53x
27x
OpticalTube Length 13.5inches
Weightof Telescope 11Lbs.
E
E
El
l
le
e
ec
c
ct
t
tr
r
ro
o
on
n
ni
i
ic
c
cS
S
Sp
p
pe
e
ec
c
ci
i
if
f
fi
i
ic
c
ca
a
at
t
ti
i
io
o
on
n
ns
s
s
InputVoltage
Maximum
Minimum
12V DC Nominal
18V DC Max.
8VDCMin.
BatteriesRequired 8AA Alkaline
PowerSupply Requirements 12 VDC-750 mA (Tip positive)
M
M
Me
e
ec
c
ch
h
ha
a
an
n
ni
i
ic
c
ca
a
al
l
lS
S
Sp
p
pe
e
ec
c
ci
i
if
f
fi
i
ic
c
ca
a
at
t
ti
i
io
o
on
n
ns
s
s
Motor:Type
Resolution
DCServo motors wit h encoders, both axes
.26arc sec
Slewspeeds Nineslew speeds: 4º /sec, 2º /sec, 1º/sec, .5/sec, 32x, 16x, 8x, 4x, 2x
HandControl Doubleline, 16 character LiquidCrystal Display
19fiber optic backlit LED buttons
ForkArm Castaluminum, with integrated handcontrol receptacle
S
S
So
o
of
f
ft
t
tw
w
wa
a
ar
r
re
e
eS
S
Sp
p
pe
e
ec
c
ci
i
if
f
fi
i
ic
c
ca
a
at
t
ti
i
io
o
on
n
ns
s
s
SoftwarePrecision 16 bit, 20 arc sec. calculations
Ports RS-232communi cation port on hand control
TrackingRates Sidereal,Solar, Lunar and King
TrackingModes Alt-Az,EQ North & EQ South
Alignment Procedures AutoAlign(2-star alignment)
Database 25user defined programmable object.
Enhancedin formation on over 100 objects
TotalObject Database 4,033