Hello All,
Sorry I'm late on this thread, I am the Outreach director for our local astronomy club, as a club, we have been around for more than 50 years.
I am asked the question about "What Scope Should I Buy" at least 5 times at any outreach event and I do more than 60 outreach events every year with approximately 25,000 observers looking through my telescopes every year.
My answer is always, "Do not buy a telescope until you have attended at least 2 star-parties with a local club", after looking through several telescopes you will have a good idea of what to expect when you look through your new scope for the first time.
also, DO NOT BUY YOUR TELESCOPE FROM A DEPARTMENT STORE, If it is advertised as this scope has 500 power or such, run out of the store screaming, don't waste your money.
A astronomical telescopes size is determined by the diameter of its primay optics, the power comes from the eyepiece that you are using at the time.
On a day to day basis, an astronomer will normally be viewing with under 150 power, on the occasion that your skies are dark enough and the seeing is steady enough looking a the moon or a planet you may boost your power higher, a good viewing buddy of mine has been in astronomy for just over 45 years and states that he has been able to push one of his scopes to over 400 power maybe 3 times in that 45 years.
I have never sucessfully used more than 200 power in the last 10 years.
If some one absolutely demands a recomendation from me;
#1 is a good pair of binoculars, mounted to a tripod.
#2 would be a 6 to 8 Inch newtonian reflector on a simple dobsonian mount
#3 a 80 to 90mm refractor, but this is probably the most difficult design to buy sucessfully the first time out, and between getting a good steady mount and a quality scope, you may have to rent the kids out for a couple of years, to keep from hocking the old homestead.
Now the above is only my opinion of course, but I have a quiver of seven telescopes that I use on a regular basis, and I have found that the best scope for the individual is the one that he will use regularly.
If it's not used you probably got something too cheap or so complicated it take you longer to get it running than the time you want to observe.
now one last thing, if it is under about $300.00 it is probably not worth buying, just save a little longer, you will be much happier in the end.
Oh, this is why I built my tear in the first place, to have a comfortable place to sleep when out at our clubs dark sky site, in the high desert of S. CA, can be VERY cold in the winter, and can be +120 for days on end in the summer, the tear is great for this purpose.
Sorry for the long post, but this subject can get very complicated.
Al Fink
www.rivastro.org