|
Refractors |
21052
FirstScope
60az |
21067
FirstScope
60EQ |
21076
FirstScope
70EQ |
21083
FirstScope
80AZ |
21086
FirstScope 80EQ |
21013
FirstScope 102AZ |
21016
C4-R |
21019
C6-R |
22062
NexStar 60GT |
22082
NexStar 80GT |
22092
NexStar 102GT |
| Optical Design |
60mm
(2.4")
Refractor |
60mm
(2.4")
Refractor |
70mm
(2.8")
Refractor |
80mm
(3.1")
Refractor |
80mm
(3.1")
Refractor |
102mm
(4.0")
Refractor |
102mm
(4")
Refractor |
150mm
(6")
Refractor |
60mm
(2.4")
Refractor |
80mm
(3.1")
Refractor |
102mm (4") refractor |
| Focal
Length |
700mm
f/12 |
900mm
f/15 |
900mm
f/13 |
900mm
f/11 |
900mm
f/11 |
500mm
f/5 |
1000mm
f/10 |
1200mm
f/8 |
700mm
f/12 |
400mm
f/5 |
500mm
f/5 |
| Finderscope |
StarPointer |
StarPointer |
StarPointer |
StarPointer |
StarPointer |
6x30 |
6x30 |
9x50 |
StarPointer |
StarPointer |
StarPointer |
| Mount |
Altazimuth |
Equatorial |
Equatorial |
Altazimuth |
Equatorial |
Altazimuth |
CG-4
Equatorial |
CG-5
Equatorial |
Motorized Altazimuth |
Motorized Altazimuth |
Motorized Altazimuth |
| Eyepiece |
1-1/4" 20mm (35x)
1-1/4" 10mm (70x) |
1-1/4" 20mm (45x)
1-1/4" 10mm (90x) |
1-1/4" 20mm
(45x)
1-1/4" 10mm
(90x) |
1-1/4" 20mm
(45x)
1-1/4" 10mm
(90x) |
1-1/4" 20mm
(45x)
1-1/4" 10mm
(90x) |
1-1/4"
20mm
(25x) |
1-1/4"
20mm
(50x) |
1-1/4"
20mm
(60x) |
1-1/4" 20mm
(35x)
1-1/4" 10mm, 4mm
(70x/175x) |
1-1/4" 25mm
(16x)
1-1/4" 10mm
(40x) |
1-1/4" 25mm
(20x)
1-1/4" 10mm
(50x) |
| Star Diagonal |
1-1/4"/1.5x E.I. Eyepiece |
1-1/4" 90º |
1-1/4" 90º |
1-1/4" 45º E. I. Eyepiece |
1-1/4" 90º |
1-1/4" 45º E. I. Eyepiece |
1-1/4" |
1-1/4" |
1-1/4" |
1-1/4" |
1-1/4" |
| Accessory
Tray |
yes |
yes |
yes |
yes |
yes |
yes |
yes |
yes |
yes |
yes |
yes |
| Tripod |
Aluminum |
Aluminum |
Aluminum |
Aluminum |
Aluminum |
Aluminum |
Aluminum |
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 |
The
Sky L1 |
The
Sky L1 & NSOL |
The
Sky L1 & NSOL |
The
Sky L1 & NSOL |
| Highest
Useful
Magnification |
142x |
142x |
165x |
189x |
189x |
241x |
241x |
354x |
142x |
189x |
241x |
| Lowest
Useful
Magnification |
|
|
|
|
|
|
15x |
21x |
9x |
11x |
15x |
| Limiting
Stellar
Magnitude |
11.4 |
11.4 |
11.7 |
12 |
12 |
12.5 |
12.5 |
13.4 |
11.4 |
12 |
12.5 |
| Resolution:
Rayleigh |
2.31
arcseconds |
2.31
arcseconds |
1.98
arcseconds |
1.73
arcseconds |
1.73
arcseconds |
1.36
arcseconds |
1.36
arcseconds |
.92
arcseconds |
2.31
arcseconds |
1.73
arcseconds |
1.36
arcseconds |
| Dawes
Limit |
1.93
arcseconds |
1.93
arcseconds |
1.66
arcseconds |
1.45
arcseconds |
1.45
arcseconds |
1.14
arcseconds |
1.14
arcseconds |
.77
arcseconds |
1.93
arcseconds |
1.45
arcseconds |
1.14
arcseconds |
| Photographic
Resolution |
156
lines/mm |
121
lines/mm |
141
lines/mm |
162
lines/mm |
162
lines/mm |
371
lines/mm |
185
lines/mm |
227
lines/mm |
156
lines/mm |
364
lines/mm |
408
lines/mm |
| Light
Gathering
Power |
73x
unaided
eye |
73x
unaided
eye |
100x
unaided
eye |
131x
unaided
eye |
131x
unaided
eye |
212x
unaided
eye |
212x
unaided
eye |
459x
unaided
eye |
73x
unaided
eye |
131x
unaided
eye |
212x
unaided
eye |
| Field of
View:
Standard
Eyepiece |
1.4º |
1.1º |
1.1º |
1.2º |
1.2º |
2.0º |
1° |
.83° |
1.4º |
3.25º |
2.5º |
| Linear FOV
(@1,000 yd.) |
75 ft. |
58 ft. |
58 ft. |
61 ft. |
61 ft. |
105 ft. |
52.5 ft |
43.8 ft |
75 ft. |
171 ft. |
131 ft. |
| Optical
Coatings |
Fully-
Coated |
Fully-
Coated |
Fully-
Coated |
Multi-
Coated |
Multi-
Coated |
Multi-
Coated |
Multi-
Coated |
Multi-
Coated |
Multi-
Coated |
Multi-
Coated |
Multi-
Coated |
| Secondary
Mirror
Obstruction |
n/a |
n/a |
n/a |
n/a |
n/a |
n/a |
n/a |
n/a |
n/a |
n/a
|
n/a |
| by Area |
|
|
|
|
|
|
n/a |
n/a |
n/a |
n/a
|
n/a |
| by Diameter |
|
|
|
|
|
|
n/a |
n/a |
n/a |
n/a
|
n/a |
| Optical tube
length |
28" |
28" |
30" |
36" |
36" |
21" |
40" |
50.5" |
28" |
15.5" |
21" |
| Telescope
Weight |
7 lb. |
11 lb. |
17 lb. |
18 lb. |
18 lb. |
17.5 lb. |
36 lb. |
57 lb. |
9.5 lb. |
11 lb. |
14 lb. |
|
COMPUTERIZED
MODELS |
|
|
|
|
|
|
|
21020
C6-RGT |
|
|
|
| Hand
Control |
|
|
|
|
|
|
|
Double line,
16 character
Crystal Display;
19 fiber
optic backlit LED buttons |
Fully Computerized |
Fully Computerized |
Fully Computerized |
|
Motor:
Type |
|
|
|
|
|
|
|
DC Servo
motors with
encoders, both axes |
|
|
|
| Slew
Speed |
|
|
|
|
|
|
|
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 |
|
|
|
| Hand
Control
Ports |
|
|
|
|
|
|
|
RS-232
communication port on
hand control |
|
|
|
|
Motor
Ports |
|
|
|
|
|
|
|
Aux Port,
Autoguide Ports |
|
|
|
| Tracking
Rates |
|
|
|
|
|
|
|
Sidereal,
Solar
and Lunar |
|
|
|
|
Tracking
Modes |
|
|
|
|
|
|
|
EQ North &
EQ South |
|
|
|
| Alignment
Procedures |
|
|
|
|
|
|
|
AutoAlign,
2-Star Alignment,
Quick Align |
|
|
|
|
Database |
|
|
|
|
|
|
|
40,000+ objects,
400 user
defined
programmable
objects |
4,000 Object Database |
4,000 Object Database |
4,000 Object Database |