Quote:
Originally Posted by janoskiss
I assume the C8 is an f/10 SCT and the A80 is an f/8ish achromat...
The 28mm UWAN and the 17mm LVW will serve you well. The 5mm would see little use in either telescope - too much power in these scopes - but you can decide for yourself: how often do you find it useful?
2x barlow if a good one will be useful with the 17mm for high power observing - planets. The 4x powermate - hmmm - with the 28mm possibly but it will be a big heavy beast.
Assuming C8 is on a tracking mount and you don't wear glasses, for planetary viewing I'd recommend a 15mm TV plossl, 12mm (and perhaps 9mm if eye relief okay for you) UO HD ortho and an Orion Deluxe 1.25" 2x barlow. These are comfortable and very high contrast EPs, as is the barlow with internal baffling (this is truly an outstanding barlow, IMO the best for planets, and does not cost a lot either!).
An 18mm HD ortho is worth considering also but you have the LVW 17mm... Use on planets in barlow (inst of short ER 9mm), on deep sky on its own. The HD will have slightly better contrast and transmission, and significantly more faithful colour rendition (not so red/yellow) which I like on planets. Also handy for faint DSOs when you are trying to tease out every last bit of light.
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Bryan, have you considered getting a larger scope? 12" Lightbridge?
Cass - Yes, I'm currently tossing up between a Celestron CGE 14" or an Obsession 20" with AN & SCGT. Either way it will be at least 18mths away, so just trying to make the most of the C8 while I'm stuck with it.
Jano - I use the 5mm in the 80. It produces equal image size / magnification to the C8 with the 17mm when veiwing Jupiter etc. Surprisingly clear & crisp.
Very useful on public viewing nights. I can have 2 people veiwing at once.
Thanks for all your other EP suggestions. All noted.
Cheers & thanks for the input.
Bryan