Quote:
Originally Posted by Paddy
Another very impressive report, Sab. I'm going to have to arrange some way of getting to those high mags you're using. I was very interested in Dave's response to your other post about the duration of the session increasing the chance of good viewing. I got up about 4.30 this morning to have a look at Jupiter, but the seeing was just awful in that part of the sky. I suspect some of this is the scope coming out of the shed into very cold air, but it wasn't bad after a while when going for the higher altitudes, so some of it must have been atmosphere. Still, I could see that there was no southern equatorial band. Did look bit odd.
Anyway, congratulations on another good night with your regenerated scope and thanks for some more targets to look for.
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Thanks Paddy. All you need is good seeing! These magnifications are a rare exception.....usually I don't go above 400x, even on small compact DSOs as I don't find mush visually appealing
Infact the 150-300x is my most used range. But this was a rare exception when faint stars come to a nice tight focus even at 762x. I've noticed that seeing becomes quite poor just before dawn, when it has been great only minutes before, not sure why this is but I theorize that the first rays of sun could be hitting the upper atmosphere and starting to excite the gases/air molecules. Something like that. David is right though, in the evenings everything is cooling off so seeing won't be as good, even if the air above is perfectly still. That's something I've always though about.
Do you have a fan on your scope?