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OPTICAL DESIGN  |
Refractor |
Maksutov-Cassegrain |
Maksutov-Cassegrain |
Refractor |
WEIGHT  |
9.5 lb (4.31 kg) |
12 lb (5.44 kg) |
18 lb (8.16 kg) |
14 lb (6.35 kg) |
APERTURE  |
60 mm (2.36 in) |
90 mm (3.54 in) |
127 mm (5 in) |
80 mm (3.15 in) |
FOCAL LENGTH  |
700 mm (27.56 in) |
1250 mm (49.21 in) |
1500 mm (59.06 in) |
900 mm (35.43 in) |
FOCAL RATIO  |
11.67 |
13.89 |
11.81 |
11.25 |
FINDERSCOPE  |
StarPointer |
StarPointer |
StarPointer |
StarPointer |
MOUNT  |
Motorized Altazimuth |
Motorized Altazimuth |
Motorized Altazimuth |
Motorized Altazimuth |
EYEPIECE 1  |
25 mm (0.98 in) |
25 mm (0.98 in) |
25 mm (0.98 in) |
25 mm (0.98 in) |
MAGNIFICATION 1  |
28 x |
50 x |
60 x |
36 x |
EYEPIECE 2  |
9 mm (0.35 in) |
9 mm (0.35 in) |
9 mm (0.35 in) |
9 mm (0.35 in) |
MAGNIFICATION 2  |
78 x |
139 x |
167 x |
100 x |
STAR DIAGONAL  |
1.25 |
1.25 |
1.25 |
1.25 |
ACCESSORY TRAY  |
No Tool, Quick release |
No Tool, Quick release |
No Tool, Quick release |
No Tool, Quick release |
TRIPOD  |
Steel |
Steel |
Steel |
Steel |
CD ROM  |
"The Sky®" Level 1 and NexStar Observers List (v2.6.4c) |
"The Sky®" Level 1 and NexStar Observers List (v2.6.4c) |
"The Sky®" Level 1 and NexStar Observers List (v2.6.4c) |
"The Sky®" Level 1 and NexStar Observers List (v2.6.4c) |
HIGHEST USEFUL MAGNIFICATION  |
142 x |
213 x |
300 x |
189 x |
LIMITING STELLAR MAGNITUDE  |
11.4 |
12.3 |
13 |
12 |
RESOLUTION (RAYLEIGH)  |
2.32 arcsec |
1.55 arcsec |
1.1 arcsec |
1.74 arcsec |
RESOLUTION (DAWES)  |
1.93 arcsec |
1.29 arcsec |
0.91 arcsec |
1.45 arcsec |
PHOTOGRAPHIC RESOLUTION  |
171 line/mm |
N/A
|
N/A
|
182 line/mm |
LIGHT GATHERING POWER  |
73 x |
165 x |
329 x |
131 x |
ANGULAR FIELD OF VIEW  |
1.6 ° |
1 ° |
0.83 ° |
1.3 ° |
LINEAR FIELD OF VIEW (@1000 YDS)  |
84 ft (25.6 m) |
53 ft (16.15 m) |
44 ft (13.41 m) |
66 ft (20.12 m) |
OPTICAL COATINGS  |
Fully-Coated |
Fully-Coated |
Fully-Coated |
Fully-Coated |
COMPUTER HAND CONTROL  |
Fully Computerized / Flash Upgradeable |
Fully Computerized / Flash Upgradeable |
Fully Computerized / Flash Upgradeable |
Fully Computerized / Flash Upgradeable |
SLEW SPEEDS  |
Nine slew speeds: 4°/sec, 2°/sec, 1°/sec, .5°/sec, 32x, 16x, 8x, 4x, 2x |
Nine slew speeds: 3°/sec, 2°/sec, 1°/sec, 64x, 32x, 16x, 8x, 4x, 2x |
Nine slew speeds: 3°/sec, 2°/sec, 1°/sec, 64x, 32x, 16x, 8x, 4x, 2x |
Nine slew speeds: 4°/sec, 2°/sec, 1°/sec, .5°/sec, 32x, 16x, 8x, 4x, 2x |
TRACKING RATES  |
Sidereal, Solar and Lunar |
Sidereal, Solar and Lunar |
Sidereal, Solar and Lunar |
Sidereal, Solar and Lunar |
TRACKING MODES  |
Alt-Az, EQ North and EQ South |
Alt-Az, EQ North and EQ South |
Alt-Az, EQ North and EQ South |
Alt-Az, EQ North and EQ South |
ALIGNMENT PROCEDURES  |
SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align |
SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align |
SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align |
SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align |
DATABASE  |
4,000 Object Database |
4,000 Object Database |
4,000 Object Database |
4,000 Object Database |
GPS  |
Optional CN-16 GPS Accessory |
Optional CN-16 GPS Accessory |
Optional CN-16 GPS Accessory |
Optional CN-16 GPS Accessory |
SECONDARY MIRROR OBSTRUCTION  |
N/A
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N/A
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N/A
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N/A
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SECONDARY MIRROR OBSTRUCTION BY AREA  |
N/A
|
N/A
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N/A
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N/A
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SECONDARY MIRROR OBSTRUCTION BY DIAMETER  |
N/A
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N/A
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N/A
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N/A
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OPTICAL DESIGN  |
Refractor |
Reflector |
Reflector |
WEIGHT  |
14 lb (6.35 kg) |
15 lb (6.8 kg) |
18 lb (8.16 kg) |
APERTURE  |
102 mm (4.02 in) |
114 mm (4.49 in) |
130 mm (5.12 in) |
FOCAL LENGTH  |
660 mm (25.98 in) |
1000 mm (39.37 in) |
650 mm (25.59 in) |
FOCAL RATIO  |
6.47 |
8.77 |
5 |
FINDERSCOPE  |
StarPointer |
StarPointer |
StarPointer |
MOUNT  |
Motorized Altazimuth |
Motorized Altazimuth |
Motorized Altazimuth |
EYEPIECE 1  |
25 mm (0.98 in) |
25 mm (0.98 in) |
25 mm (0.98 in) |
MAGNIFICATION 1  |
26 x |
40 x |
26 x |
EYEPIECE 2  |
9 mm (0.35 in) |
9 mm (0.35 in) |
9 mm (0.35 in) |
MAGNIFICATION 2  |
73 x |
111 x |
72 x |
STAR DIAGONAL  |
1.25 |
N/A
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N/A
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ACCESSORY TRAY  |
No Tool, Quick release |
No Tool, Quick release |
No Tool, Quick release |
TRIPOD  |
Steel |
Steel |
Steel |
CD ROM  |
"The Sky®" Level 1 and NexStar Observers List (v2.6.4c) |
"The Sky®" Level 1 and NexStar Observers List (v2.6.4c) |
"The Sky®" Level 1 and NexStar Observers List (v2.6.4c) |
HIGHEST USEFUL MAGNIFICATION  |
241 x |
269 x |
307 x |
LIMITING STELLAR MAGNITUDE  |
12.5 |
12.8 |
13.1 |
RESOLUTION (RAYLEIGH)  |
1.37 arcsec |
1.22 arcsec |
1.07 arcsec |
RESOLUTION (DAWES)  |
1.14 arcsec |
1.02 arcsec |
0.89 arcsec |
PHOTOGRAPHIC RESOLUTION  |
308 line/mm |
228 line/mm |
400 line/mm |
LIGHT GATHERING POWER  |
212 x |
265 x |
345 x |
ANGULAR FIELD OF VIEW  |
1.7 ° |
1.1 ° |
1.7 ° |
LINEAR FIELD OF VIEW (@1000 YDS)  |
91 ft (27.74 m) |
59 ft (17.98 m) |
91 ft (27.74 m) |
OPTICAL COATINGS  |
Multi-Coated |
Aluminum |
Aluminum |
COMPUTER HAND CONTROL  |
Fully Computerized / Flash Upgradeable |
Fully Computerized / Flash Upgradeable |
Fully Computerized / Flash Upgradeable |
SLEW SPEEDS  |
Nine slew speeds: 4°/sec, 2°/sec, 1°/sec, .5°/sec, 32x, 16x, 8x, 4x, 2x |
Nine slew speeds: 4°/sec, 2°/sec, 1°/sec, .5°/sec, 32x, 16x, 8x, 4x, 2x |
Nine slew speeds: 4°/sec, 2°/sec, 1°/sec, .5°/sec, 32x, 16x, 8x, 4x, 2x |
TRACKING RATES  |
Sidereal, Solar and Lunar |
Sidereal, Solar and Lunar |
Sidereal, Solar and Lunar |
TRACKING MODES  |
Alt-Az, EQ North and EQ South |
Alt-Az, EQ North and EQ South |
Alt-Az, EQ North and EQ South |
ALIGNMENT PROCEDURES  |
SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align |
SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align |
SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align |
DATABASE  |
4,000 Object Database |
4,000 Object Database |
N/A
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GPS  |
Optional CN-16 GPS Accessory |
Optional CN-16 GPS Accessory |
Optional CN-16 GPS Accessory |
SECONDARY MIRROR OBSTRUCTION  |
N/A
|
1.6 in (40.64 mm) |
1.7 in (43.18 mm) |
SECONDARY MIRROR OBSTRUCTION BY AREA  |
N/A
|
12.7 % |
11 % |
SECONDARY MIRROR OBSTRUCTION BY DIAMETER  |
N/A
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35.6 % |
33.2 % |
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