I think I screwed up !
Posted 11 February 2008 - 04:35 PM
Posted 11 February 2008 - 05:11 PM
Posted 11 February 2008 - 07:25 PM
Do you get crisp images at that level of magnification though ?
It all depends what seeing conditions happen to be. Where I live there are these thermals that come from the nearby mountains and wreak havoc with what I'm trying to view. Sometimes they calm down enough to use high magnification, but other times there's so much turbulence that whatever I'm looking at appears to be under a shallow running stream. I sat out one night when Mars was closest to Earth peering into the scope waiting for a clear moment. After what seemed like hours it came briefly allowing me to see the polar cap and some darker patches, but then as quickly as it cleared, it became lousy again. Last night I tried looking at Saturn. About a week ago I had one moment when it looked terrific at high power. Last night wasn't one of those nights. Saturn rippled and bubbled and looked awful. I had to revert to low power.
Posted 11 February 2008 - 09:18 PM
Just had to jump in here - this was the substance of my first post to the cats and casses group. The short answer to your question is that anywhere shorter than my 13mm eyepiece (remember, I've got the 6SE as well), the views were unimpressive and I felt I couldn't find focus. I really think this has been a combination of bad seeing and cold (and dropping) temperatures. I had a great evening a few days ago where things looked sharper (a 9mm was acceptable on Mars, but still not much detail). I believe that the collimation is ever so slightly off from looking at defocused stars, but I'm not ready to tackle that yet. At lower mags, on stars, clusters, nebulae, it was just brilliant. Also, for some reason, alignment and tracking were exceptional too.
Do you find that the focuser is a little difficult to get right at high magnifications ? Do you get sharp views of Saturn/Jupiter/Mars at high magnification ? With an 8mm Televue Plossl my views of Mars/Saturn are fairly dull and looked unfocused.
Posted 12 February 2008 - 03:01 AM
Posted 12 February 2008 - 12:25 PM
Posted 12 February 2008 - 03:44 PM
Posted 12 February 2008 - 05:33 PM
Posted 12 February 2008 - 05:47 PM
Posted 12 February 2008 - 06:14 PM
Posted 12 February 2008 - 06:16 PM
Posted 13 February 2008 - 02:19 PM
Posted 13 February 2008 - 03:15 PM
So you reckon a 8i Special Edition will go fine on my 6SE mount ?
It should work. The tube will be bigger so you'll have to slide it so the diagonal doesn't bottom out when the scope is pointed towards zenith.
Posted 13 February 2008 - 05:31 PM
Posted 13 February 2008 - 05:47 PM
Posted 13 February 2008 - 06:12 PM
Posted 13 February 2008 - 06:22 PM
Posted 13 February 2008 - 06:58 PM
Imaging your mount and your OTA. Simply rotate it by 180degrees. See what I mean then. The Celestron writing will be right way up again if you use the controller and rotate the OTA on the ALT axis.
Posted 13 February 2008 - 10:50 PM
Posted 14 February 2008 - 03:17 AM
This is how the scope is now, corrected.
This is turned around, off mount and turn 180 degress
Now I just move the mount, to turn the scope all the way back, so it appears correct, you can see the tightening bolt is now facing up
Now put it in the correct way up again by taking it off and rotating 180degrees, fits completely flush when this way around as opposed to slightly raised when wrong. The secondary holder gets in the way when wrong way.
Close up to show that the little align arrows now meet, to prove it's the right way up
Posted 14 February 2008 - 06:28 AM
I have no idea if that would mess alignment up or not. But, My opinion is it would have caused tons of trouble because of electronic orientation in the systems memory.
I would have had no idea it should have been any other way either if it was my first scope! Glad mine was set up right.
Posted 14 February 2008 - 01:32 PM