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How to Buy a Telescope : Parts of Refractor Telescope

  • August
  • 12

10:05 am Tech

expertvillage asked:


Discussion of the components of a refractoring telescope. Learn how a telescope works in this free home astronomy equipment video from a telescope designer and manufacturer. Expert: Bill Burgess Bio: Bill Burgess is the owner and founder of Burgess Optical, which is world-renowned for its custom-built telescopes and planetary eyepieces. Filmmaker: Dimitri LaBarge


15 comments

i have D7000 nikon and i like to take some pics of the sky , shuld i get an ed glass telescope for best photos ??

Posted by fahadmod, on August 13th, 2011, at 10:12 pm. #.

@MrDiamonds01 8″ (200mm) Dobsonian if you can maintain it, eitherwise any good refractor goto.

Posted by M3T4LSTORM, on August 18th, 2011, at 12:06 am. #.

How far can i see with a? FL 900mm of Objective and FL 15mm Plossl eyepiece Telescope? (Objective L3002 at website surplusshed com)

Posted by SoumyaSumitra, on August 18th, 2011, at 6:03 pm. #.

whats the easiest means of myself as a wheelchair user (unable to stand at all) to have full enjoyment of astronmy ie a scope thats as easy to use as possible?

Posted by MrDiamonds01, on August 21st, 2011, at 3:53 pm. #.

Great Video

Posted by hyakutake1989, on August 25th, 2011, at 3:38 am. #.

@nehal0001 no prob…i’m glad you are having fun with that scope

Posted by animedrawer84, on August 28th, 2011, at 12:43 am. #.

@animedrawer84 thanx for d advise but now i hav purchased dat telescope and quite happy wid dat

Posted by nehal0001, on August 31st, 2011, at 8:33 am. #.

@nehal0001 you should try to get a refractor between 80mm to 100mm of aperture……the 4mm eyepiece would give you a 175x magnification which to me is a lot for that scope…my advise is try to avoid it and get a 4.5 to 8 reflector or a 80mm to 100mm refractor… and buy a well known brand like orion celestron or meade

Posted by animedrawer84, on September 2nd, 2011, at 3:54 pm. #.

Aperture 60mm Lens

Focal Length 700mm

Focal Ratio f/11.7

Eyepieces 1) 4mm, 2) 12.5mm, 3) 20mm

Erecting Eyepiece Yes

Finderscope 5×24

Stand Aluminum Tripod

Mount Altazimuth Metal Mount

Lens Achromat Doublet

Magnification 1) 35x, 2) 56x 3) 175x

Barlow 3x

Resolution 1.9 Arc Seconds

Visibility Can see 10.9 †Magnitude star

Weight: 5 kg
these r d specs of my tele.
is dat a gud one??

Posted by nehal0001, on September 4th, 2011, at 10:01 pm. #.

Great Video.

Posted by TheDarkSagan, on September 5th, 2011, at 5:26 pm. #.

Good advice. No collimation (mirror alignment) issues to deal with with a refractor, it stays put. With a dodsonian, the mirrors will eventually need re-alignment and that is a big stumbling block for a beginner. Anyone who has ever tried to explain the alignment procedure knows this. The refractor he is showing is a high end model, there are really good less expensive ones available. Before you buy any telescope/mount make sure you do a lot of research on which best matches what you want.

Posted by monkeyboy4746, on September 8th, 2011, at 6:20 am. #.

Bad advice. Its better to start with a moderately sized dobsonian. Say 6″ for a beginner. They are still very manageable.

Posted by joeyisfunny, on September 10th, 2011, at 5:55 am. #.

Sounded like reasonable advice for beginners to me, which part did you think was half-true, Spaceisneat?

Posted by deathcow, on September 13th, 2011, at 5:39 am. #.

who is this guy? The information he provides is not even half true at times…

Posted by Spaceisneat, on September 15th, 2011, at 8:58 am. #.

By “plastic” eyepieces, do you mean plastic lenses?
Just a clarifying question

Posted by Kenzofeis, on September 15th, 2011, at 1:14 pm. #.

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