Jump to content


Photo

refractor best for doubles?

  • Please log in to reply
63 replies to this topic

#51 Asbytec

Asbytec

    Guy in a furry hat

  • *****
  • Posts: 8335
  • Joined: 08 Aug 2007
  • Loc: La Union, PI

Posted 21 November 2012 - 10:11 PM

LOL, Daniel. Spikes!

Well, if a refractor was looking over a clothes line, eh?

(Chuckling silently to myself.)

#52 Daniel Mounsey

Daniel Mounsey

    Vendor (Woodland Hills)

  • *****
  • Vendors
  • Posts: 5480
  • Joined: 12 Jun 2002

Posted 21 November 2012 - 10:19 PM

LOL!!! Maybe you could share something that gives an idea of the appearance in the eyepiece. The Albireo image is too saturated.

#53 Asbytec

Asbytec

    Guy in a furry hat

  • *****
  • Posts: 8335
  • Joined: 08 Aug 2007
  • Loc: La Union, PI

Posted 21 November 2012 - 10:32 PM

If you looking for something with spikes, I'd have to drop by the mall. :)

Well, cooled and perfectly collimated and obstructed, maybe something like...

Attached Files



#54 zvaragabor

zvaragabor

    Sputnik

  • -----
  • Posts: 34
  • Joined: 25 Jan 2011

Posted 30 November 2012 - 06:20 AM

Do you think a 90/1000 refractor is good for double star observing?

#55 azure1961p

azure1961p

    Voyager 1

  • *****
  • Posts: 10432
  • Joined: 17 Jan 2009
  • Loc: USA

Posted 30 November 2012 - 07:30 AM

A 90mm is fine and some folks are forever content and even prefer it over larger though obstructed telescopes. I prefer my 6 and 8 over a smaller refractor as the available list of doubles resolvable in both seperation and color is substantially longer. The bigger you go the less u have to pick and choose but those beautiful BRIGHT doubles can then appear blown out and glaring through bigger apertures. Just some thoughts. My 70mm is dandy on doubles but I prefer my 8".

Pete

#56 zvaragabor

zvaragabor

    Sputnik

  • -----
  • Posts: 34
  • Joined: 25 Jan 2011

Posted 30 November 2012 - 07:35 AM

Thanks azure. Unfortunately 6" (and more) is out of my budget, and it even needs a larger mounting, which weighs and cost even more. I want a lightweight and low-budget scope. I even thought of a 4"/1000.

#57 WRAK

WRAK

    Apollo

  • -----
  • Posts: 1172
  • Joined: 18 Feb 2012
  • Loc: Vienna, Austria, Europe

Posted 30 November 2012 - 10:37 AM

With a 4" refractor you have many 1000 interesting doubles within the range of your scope and it es very easy to use - certainly a good choice for DSO.
Wilfried

#58 azure1961p

azure1961p

    Voyager 1

  • *****
  • Posts: 10432
  • Joined: 17 Jan 2009
  • Loc: USA

Posted 30 November 2012 - 11:25 AM

Youmight find Orion's 6" f/8 reflector dob very budget friendly. Probably more affordable than the refractor. I appreciate your budget concerns. At anyrate either system well made is at least good.

Pete

#59 zvaragabor

zvaragabor

    Sputnik

  • -----
  • Posts: 34
  • Joined: 25 Jan 2011

Posted 30 November 2012 - 01:23 PM

I own a 10" reflector dob, so a 90mm refractor would be a huge step back. But my dream is to observe doubles with a long focal length refractor. A refractor with aperture 90-100mm, and f/ratio f12-15 would be the best, but unfortunately it's a rarity in Hungary. The closest match is a Meade DS-90 (90/1000), a Soligor 3.7"/1000, or a Celestron 100/1000. All the tree are within budget, but the longest f/ratio is the meade. I know the bigger aperture means a slightly better resolution, but I symphatize with the meade.

#60 azure1961p

azure1961p

    Voyager 1

  • *****
  • Posts: 10432
  • Joined: 17 Jan 2009
  • Loc: USA

Posted 30 November 2012 - 06:47 PM

In that case get the refractor by all means. It compliments what you have in the 10" and if ever you feel the need for more resolution reach for the ten. Both s opes would actually strike quite a fine balance. It IS fun going between my refractor and reflector. I thought you were looking for one to do it all. And a lot of folks who are seasoned observers actually are fine with four.

Good luck with your choice. You were fine anyway I just thru in my two cents.

#61 azure1961p

azure1961p

    Voyager 1

  • *****
  • Posts: 10432
  • Joined: 17 Jan 2009
  • Loc: USA

Posted 30 November 2012 - 06:47 PM

In that case get the refractor by all means. It compliments what you have in the 10" and if ever you feel the need for more resolution reach for the ten. Both s opes would actually strike quite a fine balance. It IS fun going between my refractor and reflector. I thought you were looking for one to do it all. And a lot of folks who are seasoned observers actually are fine with four.

Good luck with your choice.

Pete

#62 rockethead26

rockethead26

    Gemini

  • *****
  • Posts: 3422
  • Joined: 21 Oct 2009
  • Loc: Arizona, USA

Posted 01 December 2012 - 07:41 AM

I agree with Jim. Doubles like Albireo have much more saturated color in my 14.5" dob than in my 120 ED. It's not even close, at least from my light polluted front yard.

#63 azure1961p

azure1961p

    Voyager 1

  • *****
  • Posts: 10432
  • Joined: 17 Jan 2009
  • Loc: USA

Posted 01 December 2012 - 02:49 PM

Its interesting Albireo with different aperture:

The yellow blows out in my 8" and actually has better saturation in my 70mm and 150mm. Conversley the daphire companion is most vivid in the 8". My perceptions anyway.

Pete

#64 zvaragabor

zvaragabor

    Sputnik

  • -----
  • Posts: 34
  • Joined: 25 Jan 2011

Posted 03 December 2012 - 05:51 AM

Thanks guys, I'll let you know which one I choose.
Cheers






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics