| Specifications |
8" |
10" |
12" |
| Optical Design |
Advanced Coma-Free |
Advanced Coma-Free |
Advanced Coma-Free |
| Clear Aperture |
203mm (8") |
254mm (10") |
305mm (12") |
| Focal Length Focal Ratio |
2000mm f/10(8") |
2500mm f/10 (10") |
3048mm f/10 (12") |
| Optical Coating |
MgF2 on
correcting plate (2-sides); standard aluminum on primary
and secondary mirrors |
| Ultra-High Transmission Coatings
(UHTC™) |
Included |
Included |
Included |
| Optical Tube
Dimensions (dia. x length) |
9.1"
x 16.75" |
11.75" x 22" |
13.6"
x 25" |
| GPS |
Sony®GPS |
Sony®GPS |
Sony®GPS |
| LNT Module |
Patented
Level-North Technology with electronic level sensor,
electronic magnetic north sensor, high-precision clock. |
| Smart Finder™ |
Red Dot viewfinder |
Red Dot viewfinder |
Red Dot viewfinder |
| Viewfinder |
8x50 |
8x50 |
8x50 |
| Telescope Mounting |
fork-type; double tine |
fork-type; double tine |
fork-type; double tine |
| Setting Circle
Diameters, RA and Dec. |
RA:
8"; Dec: 5" |
RA:
8"; Dec: 5" |
RA:
8"; Dec: 5" |
| Zero Image-Shift Micro Focuser |
optional |
optional |
optional |
| GO TO Pointing
Precision (approx.) |
5-arc
mins. |
5-arc
mins. |
5-arc
mins. |
| Pointing Precision, High Precision
Mode |
3-arc mins. |
3-arc mins. |
3-arc mins. |
| Slow-Motion Controls |
electric, RA and Dec |
electric, RA and Dec |
electric, RA and Dec |
| #497 AutoStar Hand Controller |
PIC 16C57 microcontroller;
2 line x 16 alphanumeric character display; 20-button
keypad, red LED backlit |
| Batteries (user-supplied) |
8 x C-cells |
8 x C-cells |
8 x C-cells |
| Battery Life (approx.) |
60 hrs. |
60 hrs. |
60 hrs. |
| Onboard Celestial Object Database |
30,223 objects |
30,223 objects |
30,223 objects |
| Slew Speeds: |
RA and Dec: 1x, 2x, 8x,
16x, 64x, 128x sidereal and 1.5°/sec., 3°/sec.,
6.5°/sec. |
| Tracking Rates |
sidereal, lunar, or custom-selected from 2000
incremental rates |
| Tube Body |
aluminum |
aluminum |
aluminum |
| Mount Castings |
aluminum |
aluminum |
aluminum |
| Primary, Secondary Mirrors |
Pyrex® glass |
Pyrex® glass |
Pyrex® glass |
| Correcting
Plate/Lens |
clear
water white glass |
clear
water white glass |
clear
water white glass |
| Telescope Weight |
33 lbs. |
50 lbs. |
60 lbs. |
| Tripod Weight |
19
lbs. |
19
lbs. |
19
lbs. |
| Field Tripod Height all models: |
30" to 44" variable |
30" to 44" variable |
30" to 44" variable |
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