Celestron
Firstscope 102 AZ Refractor
 |
Optical
Design |
102mm (4.0") refractor |
Focal
Length |
500mm f/5 | |
| Finderscope |
6x30 | |
Mount |
Altazimuth | |
| Eyepiece |
1-1/4" -20mm (25x) | |
Eyepiece |
n/a | |
| Star
Diagonal/Erect Image Eyepiece |
1-1/4" 45 degrees Erect Image | |
Accessory
Tray |
yes | |
| Tripod |
Aluminium | |
CD
ROM |
The Sky L1 |
 |
Highest
Useful Magnification |
1241x |
Limiting
Stellar Magnitude |
12.5 | |
| Resolution:
Rayleigh |
1.35 arcseconds | |
Dawes
Limit |
1.14 arcseconds | |
| Photographic
Resolution |
371 lines/mm | |
Light
Gathering Power |
212x unaided eye | |
| Field
Of View: standard eyepiece |
2 degrees | |
Linear
FOV (@1000 yd.) |
105 ft. | |
| Secondary
Mirror Obstruction |
n/a | |
Optical
Coatings |
Multi-Coated | |
| Optical
Tube Length |
21" | |
Telescope
Weight |
17.5 lb. |