Celestron
Firstscope 80 EQ Refractor
 |
Optical
Design |
80mm (3.1") refractor |
Focal
Length |
900mm f/11 | |
| Finderscope |
StarPointer | |
Mount |
Equatorial | |
| Eyepiece |
1-1/4" -20mm (45x) | |
Eyepiece |
1-1/4" -10mm (90x) | |
| Star
Diagonal/Erect Image Eyepiece |
1-1/4" 90 degrees | |
Accessory
Tray |
yes | |
| Tripod |
Aluminium | |
CD
ROM |
The Sky L1 |
 |
Highest
Useful Magnification |
189x |
Limiting
Stellar Magnitude |
12 | |
| Resolution:
Rayleigh |
1.73 arcseconds | |
Dawes
Limit |
1.45 arcseconds | |
| Photographic
Resolution |
162 lines/mm | |
Light
Gathering Power |
131x unaided eye | |
| Field
Of View: standard eyepiece |
1.2 degrees | |
Linear
FOV (@1000 yd.) |
61 ft. | |
| Secondary
Mirror Obstruction |
n/a | |
Optical
Coatings |
Multi-Coated | |
| Optical
Tube Length |
36" | |
Telescope
Weight |
18 lb. |