ColHut
07-08-2008, 12:56 AM
Notwithstanding the high cirrus cloud tonight I got out my 4.5" f8 and 10" f5 and compared the GSO 25mm in the 4.5" and the 30mm SV in the 10". They both provide about the same magnification. I was impressed with the larger number of stars visible in the 10" (naturally you say) despite the haze. But as a relative beginner impressive all the same.
I also got a chance to try my new 5mm TMB/Burgess planetary in the 10" on Jupiter. I was very impressed with the lack of distortion right out to the edge of view (AFOV a modest 60 degrees). But it was great to see so many bands in so much detail. Really good. I also note that my meade 9.7mm which whilst crisp in the f8 was really providing too small images seems much better in my f5 - not only 1/3 bigger but still very crisp. Maybe something to do with exit pupil perhaps?
Anyway curses to the clouds but I really enjoyed the views with the new and old eyepieces.
:D
I also got a chance to try my new 5mm TMB/Burgess planetary in the 10" on Jupiter. I was very impressed with the lack of distortion right out to the edge of view (AFOV a modest 60 degrees). But it was great to see so many bands in so much detail. Really good. I also note that my meade 9.7mm which whilst crisp in the f8 was really providing too small images seems much better in my f5 - not only 1/3 bigger but still very crisp. Maybe something to do with exit pupil perhaps?
Anyway curses to the clouds but I really enjoyed the views with the new and old eyepieces.
:D