|
REFLECTORS |
31034
FirstScope
76 Tabletop |
31044
FirstScope
114EQ
|
31041
FirstScope
114EQ
Short
|
31056
c6-n |
31061
C8-N |
11047
C10-N |
31122
NexStar
76GT |
31142
NexStar
114GT |
31132
NexStar
130GT |
| Optical Design |
76mm
(3")
Reflector |
114mm
(4.5")
Reflector |
114mm
(4.5")
Reflector |
150mm
(6.0")
Reflector |
203mm
(8")
Reflector |
254mm
(10")
Reflector |
76mm (3") diameter Newtonian Reflector |
114mm (4.5") Reflector |
130mm (5.1") Reflector |
| Focal
Length |
600mm
f/8 |
900mm
f/8 |
1000mm
f/9 |
750mm
f/5 |
1000mm
f/5 |
1200mm
f/4.7 |
700mm f/9.2 |
1000mm f/9 |
650mm f/5 |
| Finderscope |
5x24 Right Angle |
StarPointer |
StarPointer |
6x30 |
9x50 |
9x50 |
StarPointer |
StarPointer |
StarPointer |
| Mount |
Altazimuth
Tabletop |
Equatorial |
Equatorial |
CG-4 Equatorial |
CG-5
Equatorial |
CG-5
Equatorial |
Motorized Altazimuth |
Motorized Altazimuth |
Motorized Altazimuth |
| Eyepiece |
.96" 20mm H
(30x)
.96" 4mm H
(150x) |
1-1/4" 20mm
(45x)
1-1/4" 10mm
(90x) |
1-1/4" 20mm
(50x)
1-1/4" 10mm
(100x) |
1-1/4" 20mm
(38x)
|
1-1/4"
20mm
(50x) |
1-1/4"
20mm
(60x) |
1-1/4" – 25mm
(28x) |
1-1/4" 25mm
(40x)
1-1/4" 10mm
(100x) |
1-1/4" – 25mm
(26x)
1-1/4" – 10mm (65x) |
| Star Diagonal |
n/a |
n/a |
n/a |
n/a
|
n/a |
n/a |
n/a |
n/a
|
n/a |
| Accessory
Tray |
n/a |
yes |
yes |
yes |
yes |
yes |
yes |
yes |
yes |
| Tripod |
Tableotop |
Aluminum |
Aluminum |
Aluminum |
2" Stainless
Steel |
2" Stainless
Steel |
Pre-Assembled
Aluminum |
Pre-Assembled
Aluminum |
Pre-Assembled
Aluminum |
| CD ROM |
The
Sky L1 |
The
Sky L1 |
The
Sky L1 |
The
Sky L1 |
The
Sky L1 |
The
Sky L1 |
The Sky L1
& NSOL |
The Sky L1
& NSOL |
The Sky L1
& NSOL |
| Highest
Useful
Magnification |
180x |
269x |
269x |
354x |
480x |
600x |
180x |
269x |
306x |
| Lowest
Useful
Magnification |
|
|
|
21x |
29x |
36x |
11x |
16x |
19x |
| Limiting
Stellar
Magnitude |
11.9 |
12.8 |
12.8 |
13.4 |
14 |
14.5 |
11.9 |
12.8 |
13.1 |
| Resolution:
Rayleigh |
1.82
arcseconds |
1.21
arcseconds |
1.21
arcseconds |
.92
arcseconds |
.69
arcseconds |
.54
arcseconds |
1.82
arcseconds |
1.21 arcseconds |
1.06 arcseconds |
| Dawes
Limit |
1.53
arcseconds |
1.02
arcseconds |
1.02
arcseconds |
.77
arcseconds |
.58
arcseconds |
.46
arcseconds |
1.53 arcseconds |
1.02 arcseconds |
0.89
arcseconds |
| Photographic
Resolution |
250
lines/mm |
250
lines/mm |
228
lines/mm |
400
lines/mm |
400
lines/mm |
425
lines/mm |
217
lines/mm |
228
lines/mm |
400
lines/mm |
| Light
Gathering
Power |
118x
unaided
eye |
265x
unaided
eye |
265x
unaided
eye |
459x
unaided
eye |
843x
unaided
eye |
1316x
unaided
eye |
118x
unaided eye |
265x unaided eye |
345x unaided eye |
| Field of
View:
Standard
Eyepiece |
1.7º |
1.2º |
1º |
1.3º |
1° |
.83° |
1.8º |
1.3º |
2º |
| Linear FOV
(@1,000 yd.) |
87.5 ft. |
60 ft. |
52.5 ft. |
68 ft. |
52.5 ft |
43.8 ft |
95 ft. |
68 ft. |
105 ft. |
| Optical
Coatings |
Aluminum |
Aluminum |
Aluminum |
Aluminum |
Aluminum |
Aluminum |
Aluminum |
Aluminum |
Aluminum |
| Secondary
Mirror
Obstruction |
1.1" |
1.6" |
1.6" |
1.75" |
2.2" |
2.3" |
.85" |
1.6" |
1.5" |
| by Area |
13% |
13% |
13% |
8.5% |
8% |
5% |
28% |
13% |
9% |
| by Diameter |
37% |
36% |
36% |
29% |
28% |
23% |
8% |
36% |
29% |
| Optical tube
length |
11" |
35" |
19" |
27" |
37" |
45" |
27" |
19" |
24.5" |
| Telescope
Weight |
4 lb. |
19 lb. |
16 lb. |
35 lb. |
67 lb. |
83 lb. |
12 lb. |
15 lb. |
18 lb. |
|
COMPUTERIZED
MODELS |
|
|
|
|
31062
C8-NGT |
11048
C10-NGT |
|
|
|
| Hand
Control |
|
|
|
|
Double line,
16 character
Crystal Display;
19 fiber
optic backlit LED buttons |
Double line,
16 character
Crystal Display;
19 fiber
optic backlit LED buttons |
Double line,
16 character
Crystal Display;
19 fiber
optic backlit LED buttons |
Double line,
16 character
Crystal Display;
19 fiber
optic backlit LED buttons |
Double line,
16 character
Crystal Display;
19 fiber
optic backlit LED buttons |
|
Motor:
Type |
|
|
|
|
DC Servo
motors with
encoders, both axes |
DC Servo
motors with
encoders, both axes |
|
|
|
| Slew
Speed |
|
|
|
|
Max Slew
Speed
4°/second |
Max Slew
Speed
4°/second |
Nine slew speeds:
4º/sec, 2º/sec, 1º/sec, .5 /sec, 32x, 16x, 8x, 4x,
2x |
Nine slew speeds:
4º/sec, 2º/sec, 1º/sec, .5 /sec, 32x, 16x, 8x, 4x,
2x |
Nine slew speeds:
4º/sec, 2º/sec, 1º/sec, .5 /sec, 32x, 16x, 8x, 4x,
2x |
|
Software
Precision |
|
|
|
|
24bit,
0.08 arcsec
calculation |
24bit,
0.08 arcsec
calculation |
|
|
|
| Hand
Control
Ports |
|
|
|
|
RS-232
communication port on
hand control |
RS-232
communication port on
hand control |
|
|
|
|
Motor
Ports |
|
|
|
|
Aux Port,
Autoguide Ports |
Aux Port,
Autoguide Ports |
|
|
|
| Tracking
Rates |
|
|
|
|
Sidereal,
Solar
and Lunar |
Sidereal,
Solar
and Lunar |
Sidereal, Solar and Lunar Sidereal |
Sidereal, Solar and Lunar Sidereal |
Sidereal, Solar and Lunar Sidereal |
|
Tracking
Modes |
|
|
|
|
EQ North &
EQ South |
EQ North &
EQ South |
|
|
|
| Alignment
Procedures |
|
|
|
|
AutoAlign,
2-Star Alignment,
Quick Align |
AutoAlign,
2-Star Alignment,
Quick Align |
|
|
|
|
Database |
|
|
|
|
40,000+ objects,
400 user
defined
programmable
objects |
40,000+ objects,
400 user
defined
programmable
objects |
4,000 Object Database |
4,000 Object Database |
4,000 Object Database |