In article ,
Allan Adler wrote:

It's a refractor. I noticed that, where the lens is, there are 6 screws

It's a refractor, and it's borrowed. Two good reasons not to mess with
it. The latter because it's very irritating to find that something
you've loaned out and mentioned that it would be OK to oil is "rebuilt"
without your blessing. Especially if the rebuilding goes awry.

The former because I'm about 99% certain that what you are describing
(right down to the zinc rack) is a cheesoid "christmas and birthday
telescope". The outside of the box prominently tells you it's 200x or
400x, it's got a wobby tripod which may have a low quality "polar"
mount, the aperture is a whopping 3 inches or so, etc. These things have
probably driven thousands of people away from astronomy.

They never work very well, and you should be able to get your own at a
junk shop, flea market, recycling center, goodwill or tag sale for very
little money. Don't buy one new. You can waste as much time and effort
as you would like tearing that apart, without annoying anyone. Don't
expect a very satisfying viewing experience.

If you actually want a telescope to look at the sky with, get a
reflector with a "dobsonian" mount. A physics teaching acquaintance has
2 or 3 of the cheesy refractors (people donate them when they discover
that they can't actually see all the stuff they thought they'd see), and
one reflector (bought). There's just no comparison, the reflector is
that much better - and not really much more expensive if bought new. You
can also go the traditional route and grind your own mirror, if you
like, or buy mirrors and build the rest of the scope (pretty easy). The
mount is easy to build, as well.

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