Jump to content


Photo

My just completed Jaegers 6-inch f/10

  • Please log in to reply
48 replies to this topic

#26 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 19 November 2012 - 11:20 AM

Oh! The Hastings tube was not bad, especially for the price. There's one small ding in the main tube, which nearly went away with the powder-coating. I did have to sand the ends a bit to get rid of the rough edges, but it was quite square, which had been a worry. Some lines also show (barely) along the tube, where the manufacturing (and more of my sanding) did not quite make it smooth. I'm almost glad it isn't perfect; this way, maybe I won't be quite as insane in how careful I am with it!

#27 dan_h

dan_h

    Surveyor 1

  • -----
  • Posts: 1980
  • Joined: 10 Dec 2007

Posted 19 November 2012 - 11:46 AM

It's a great looking scope. Nicely done!

dan

#28 tim53

tim53

    Cosmos

  • *****
  • Posts: 9416
  • Joined: 17 Dec 2004
  • Loc: Highland Park, CA

Posted 19 November 2012 - 12:53 PM

Beautiful paint job and overall nice job! I also like the handle/finder mounts made out of aluminum square tubing. Great idea!

JimC


I was going to say exactly the same thing. I really like how that turned out! What an elegant way to turn a rather spartan, even ugly square tube into something attractive while still being very functional! Gives me some ideas... ...like how about putting hardwood inserts inside the tube, fer instance!

Love the red tube, too!

-Tim.

#29 rboe

rboe

    ISS

  • *****
  • Posts: 67114
  • Joined: 16 Mar 2002
  • Loc: Phx, AZ

Posted 19 November 2012 - 01:02 PM

Wow! :jawdrop: That turned out nice!

Is the 127mm lense? What size tubing did you buy for the dew sheild?

#30 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 19 November 2012 - 01:30 PM

I like the idea of hardwood inserts, and will give that some thought. However, the opening in the handle actually seems to work as a rough finder; sort of a very poor man's Telrad. I plan to buy a G-11 to put this on, and I tend to push to objects. I want to see if I'm right about rough alignment with the handle (skies are supposed to clear tomorrow).

The tubing for the shield is 8-inch; the main tube is 7-inch, for the 6-inch lens. Dan Crawford originally thought he'd be able to make the cell take a 7-inch dew shield, but later wrote to say that 7.5-inches was the smallest he could get it. In the meantime, I had ordered and started finishing a 7-inch shield. I've attached a photo. If someone wants it, I'd be glad to pack it up and send it for the shipping cost. It's a 7-inch outer diameter pipe, with a .060 inch thick wall; nine inches long. Unpainted inside and out, but sanded with 320 grit. The cap was also made to use the solar filters I made for my 5-inch scopes. The photo doesn't show it, but the cap is made from a thin ring of birch plywood, with a thinner piece glued on the front.

Attached Files



#31 tim53

tim53

    Cosmos

  • *****
  • Posts: 9416
  • Joined: 17 Dec 2004
  • Loc: Highland Park, CA

Posted 19 November 2012 - 01:58 PM

I like the idea of hardwood inserts, and will give that some thought. However, the opening in the handle actually seems to work as a rough finder; sort of a very poor man's Telrad. I plan to buy a G-11 to put this on, and I tend to push to objects. I want to see if I'm right about rough alignment with the handle (skies are supposed to clear tomorrow).


This reminds me of another idea I had for a zero-power finder. And it might work in this case, too. I make a lot of my tubes out of plywood, so they're polygonal. Even with just a semi-gloss polyurethane on them, I can sight along the tube and line up on a bright star or planet by getting its reflection to converge with the sky view. So, you could probably do the same with your square tubing, even if you were to put inserts on the inside, by sighting along the outside faces.

-Tim.

#32 tim53

tim53

    Cosmos

  • *****
  • Posts: 9416
  • Joined: 17 Dec 2004
  • Loc: Highland Park, CA

Posted 19 November 2012 - 02:01 PM

I should note that this worked so well with my 12.5" f/23 Cassegrain that it was more than a year before I put a finder on it. Just sighting along the tube sides was enough to get the object in the field of view of a 28mm RKE at the Cass focus (the telrad in this pic was added later):

Posted Image

-Tim.

#33 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 19 November 2012 - 02:04 PM

Great idea, Tim. Thanks!

#34 Rutilus

Rutilus

    Surveyor 1

  • -----
  • Posts: 1874
  • Joined: 17 Dec 2010

Posted 19 November 2012 - 03:13 PM

Great refractor build.

#35 mikey cee

mikey cee

    Cosmos

  • *****
  • Posts: 8122
  • Joined: 18 Jan 2007
  • Loc: bellevue ne.

Posted 19 November 2012 - 05:20 PM

Paul a red finder will put the cherry on top of this bad boy|! :bow: Nicely done! :D Mike

#36 rboe

rboe

    ISS

  • *****
  • Posts: 67114
  • Joined: 16 Mar 2002
  • Loc: Phx, AZ

Posted 19 November 2012 - 06:38 PM

I keep reading and misreading your dew shield post. :p I think I can make use of the 7" dew shield if you have not gotten rid of it yet. PM for details.


#37 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 19 November 2012 - 09:25 PM

Thanks once more for all the nice words!

And, Ron, I just sent you a PM.

#38 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 19 November 2012 - 09:31 PM

I've built several other scopes, but they were all of the just-so-it-works style. Nothing very handsome. This one looks nice enough that my next project will be to build a well-padded, solid case for it. With wheels on one end. (The scope is pretty massive and unwieldy.)

#39 rboe

rboe

    ISS

  • *****
  • Posts: 67114
  • Joined: 16 Mar 2002
  • Loc: Phx, AZ

Posted 19 November 2012 - 11:25 PM

The 5" aint' light either.

#40 Dave O

Dave O

    Ranger 4

  • *****
  • Posts: 380
  • Joined: 21 Dec 2011
  • Loc: Sri Lanka

Posted 20 November 2012 - 12:24 AM

Stunning! Absolutely beautiful. Thanks for sharing.

#41 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 20 November 2012 - 10:38 AM

Thanks, Dave!

#42 Project Galileo

Project Galileo

    Viking 1

  • *****
  • Posts: 838
  • Joined: 14 Nov 2007
  • Loc: Jefferson County, Colorado

Posted 20 November 2012 - 12:22 PM

Great work, fine craftsmanship, and an excellent result. Enjoy!

#43 Anil

Anil

    Vostok 1

  • *****
  • Posts: 196
  • Joined: 21 Nov 2007
  • Loc: Bangalore, India

Posted 21 November 2012 - 02:14 AM

Awesome looking scope, love the color, great work. Cradle design is a beauty!

#44 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 21 November 2012 - 01:40 PM

Thanks again for the comments!

I went out today and bought the materials for a case to hold it, and will hope that the clear skies that have been forecast for three days will actually happen soon.

#45 rwiederrich

rwiederrich

    Goldfinger

  • *****
  • Posts: 12623
  • Joined: 17 Nov 2005
  • Loc: Gorst Washington(center of the Universe)

Posted 21 November 2012 - 04:52 PM

Great job Paul....I love homemade refractors..my specialty.

Again..awesome job.. :bow: :bow:

Rob

#46 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 21 November 2012 - 08:01 PM

I just set the scope up and took a look at the moon. I'm no optics expert, but all looked great to me. Especially since the seeing was not good, and lots of wispy clouds got in the way. I'm going out in a couple of hours to look at Jupiter. I have a friend whose got experience collimating refractors, and he's going to come help me check that. I might as well get the best out of it that I can.

#47 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 22 November 2012 - 09:42 AM

Thanks, Rob!

#48 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 01 December 2012 - 05:53 PM

I've made a sturdy but ugly case for it.

Attached Files



#49 PaulEK

PaulEK

    Viking 1

  • *****
  • Posts: 646
  • Joined: 25 May 2008
  • Loc: Wisconsin

Posted 01 December 2012 - 06:02 PM

It has a handle on top, and another in the front. I put casters in the rear so that I can roll it to where I want it. Between the long case itself and the scope, this has to weigh about 50 pounds. It has found a place near the front door for now, and wants to go outside.

I also bought a new diagonal for it. I only had a cheap one from the Surplus Shed. When I tested it using the cheap diagonal, views became mushy by 200x. I only had a short time of clear skies, so could not raise the tripod and use it straight through. I'm hoping the new diagonal will allow me to go higher. I guess it could have been the seeing. It also might need collimation.

Another question is whether the tape spacers that came with it from the Shed are the right thickness. Can anyone point me to information on just how thick the spacing should be? I don't want to mess with it if I don't need to.

Of course, I could also have bought a lens that is just not that great. I hope not, and will assume not, for now.

Attached Files








Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics