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Hi Kolya, welcome to astronomy.
If you buy a Dob I would suggest spending a little more and
get yourself a collapsible one which makes it much easier to carry,
and easier to find room for it in your car. If you get the opportunity
before you buy, try to check out a 10", for not many more dollars they
offer great viewing. A Skywatcher 10" tube assembly weighs about
14kg; I don't know if that weight would be o.k. for you. A 10" will
keep you satisfied for longer than an 8".[most of us succumb to
what is known as aperture fever sooner or later].
I can't vouch for other brands, but Skywatcher Dobs come with
full assembly instructions, and take 30 to 60 mins to assemble[depending
on how good you are with a screwdriver]. It's only the base that you
have to assemble, the tube assy. is complete.
I wouldn't worry in the least about how you will be received
at your local club. If it is seen that you are really interested in
learning, there will be no shortage of people only too happy to help
you. Don't get me wrong, an 8" is fine if you don't want to spend the
extra money, or you think that 14kg is a bit heavy.
hope this helps
raymo
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