s******o
发帖数: 298 | 1 不过比较短
Celestron C8+ f/10 SCT (1994)... Gathering over twice as much light, I noticed
a big jump in brightness of objects with the C8+. Optically it was excellent,
but again, I was just learning how to judge this. Views of Jupiter and
Saturn were crisp. Deep sky was excellent from my suburban site. M1 and other
harder to find Messier objects were easy with practice. No mirror shift was
noted. There was vibration still noted from the dual fork arm setup, and was
distracting when focusing. M46 beca |
|
