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Equipment Discussions >> ATM, Optics and DIY Forum

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StarStuff1
Post Laureate
*****

Reged: 04/01/07

Loc: South of the Mason-Dixon Line
Re: Post your home made scope new [Re: John Jarosz]
      #5805198 - 04/17/13 06:38 PM Attachment (127 downloads)

OK, an ultra small and easy build. About 12 years ago I obtained a 30mm long focus coated achromat. With a double negative singlet placed in a lathe turned ep holder/friction focuser tube and a cardboard mailing tube I created a Galileo replica scope. I mounted the G-scope on my (then) 5-in APO. At outreach events I would put an object in the ep of the APO and then ask the folks to look through the G-scope. Many were amazed at the narrow fov. The magnification of the G-scope was about 30X, similar to Galileo's most "powerful" refractor. Of course the color correction of the G-scope was much better and the image brighter due to the larger aperture. The G-scope will be on display and for hands on use this Saturday, Astronomy Day.

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macdonjh
journeyman


Reged: 03/06/06

Re: Post your home made scope new [Re: StarStuff1]
      #5815651 - 04/22/13 04:29 PM Attachment (118 downloads)

Here's my 200mm f/20 Classical Cassegrain. The first good star test was April 20. It's been a long road.

Edited by macdonjh (04/22/13 04:35 PM)


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macdonjh
journeyman


Reged: 03/06/06

Re: Post your home made scope new [Re: titanio]
      #5815669 - 04/22/13 04:40 PM

That is now my latest dream scope. Glad to hear you can mount it on a Losmandy Titan.

Edited by macdonjh (04/23/13 03:30 PM)


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scopemankit
sage


Reged: 01/27/09

Loc: south africa
Re: Post your home made scope new [Re: John Jarosz]
      #5817989 - 04/23/13 05:04 PM

My 12" F16 Naysmith Cass In its dome at the Cederberg Observatory. 90mm F11 refractor piggy back

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beanerds
sage


Reged: 07/15/08

Loc: Darwin Australia
Re: Post your home made scope new [Re: scopemankit]
      #5824040 - 04/26/13 10:34 AM Attachment (121 downloads)

Here is my 125mm f14 newt , its a planet killer with its 3/4 inch secondary .
the mount is 1 1/2 inch pipe fittings , super sturdy .
The OTA is fully 360* rotatable .
I made every part on this , Miss Goldie , scope except the secondary mirror and red dot finder .
Brian.

Edited by beanerds (04/26/13 10:39 AM)


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beanerds
sage


Reged: 07/15/08

Loc: Darwin Australia
Re: Post your home made scope new [Re: beanerds]
      #5824051 - 04/26/13 10:37 AM Attachment (76 downloads)

Here she is in 2 pieces .
Brian.


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tag1260
scholastic sledgehammer
*****

Reged: 10/07/12

Loc: Ohio, USA
Re: Post your home made scope new [Re: beanerds]
      #5824057 - 04/26/13 10:39 AM

How about a few close ups of that thing. Looks like you did a really nice job.

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beanerds
sage


Reged: 07/15/08

Loc: Darwin Australia
Re: Post your home made scope new [Re: tag1260]
      #5824063 - 04/26/13 10:42 AM Attachment (91 downloads)

Here is the curved spider and 3/4 inch secondary , made out of a 1/2 inch wide 12 inch s/s ruler .
Brian.


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beanerds
sage


Reged: 07/15/08

Loc: Darwin Australia
Re: Post your home made scope new [Re: beanerds]
      #5824069 - 04/26/13 10:45 AM Attachment (86 downloads)

Note the $5 PVC plumbing helical focuser, works very well . And its 1 1/4 inch as well .
Here is the EQ mount . Super strong and all the threads are lapped in using car engine ' Valve grinding paste ' and the knobs have teflon tips that press against the male threads to adjust tension ( these knobs cane from the local tip , off an old school desk ) I fitted the teflon my self .
Brian.

Edited by beanerds (04/26/13 10:53 AM)


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beanerds
sage


Reged: 07/15/08

Loc: Darwin Australia
Re: Post your home made scope new [Re: beanerds]
      #5824113 - 04/26/13 10:59 AM Attachment (60 downloads)

Here you can see the cover that protects the primary and she's a beauty 1710mm f/l of hand made goodness , as close as perfect I could get and also the rotation set up of the OTA in its cradle .
Brian.


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Jeronimo Cruz
professor emeritus
*****

Reged: 09/01/08

Loc: Tucson, Arizona
Re: Post your home made scope new [Re: beanerds]
      #5824213 - 04/26/13 11:44 AM

Great job Brian. F/14 and a curved 3/4" secondary?! WOW! Planet killer indeed.

She's a beauty.

How long did the project take to complete?

Cheers.


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tim53
Postmaster
*****

Reged: 12/17/04

Loc: Highland Park, CA
Re: Post your home made scope new [Re: Jeronimo Cruz]
      #5824538 - 04/26/13 02:23 PM

Really nice piece of work!

-Tim.


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beanerds
sage


Reged: 07/15/08

Loc: Darwin Australia
Re: Post your home made scope new [Re: tim53]
      #5825207 - 04/26/13 07:43 PM Attachment (93 downloads)

thanks guys , it took about 6 month to build Jeronimo .
The 6 inch top and bottom alluminium tube sections and the 8 inch main section ( that the 6 inch bottom section rotates in on teflon spacers ) are off cuts from the ship yards I used to work in . Note the 30* slash cut on the bottom of the 8 inch section , thats how I got itout of the scrap bin and did not bother squaring it off . Looks good that way I think ? .
They are sections of ducting that are used in the 10 ANZAC Frigates we built .
The 3 inch steel pipe of the mount, 2x 150# flanges along with the 1 inch legs and pipe fittings were found at the local tip .
Finially the 6 x 20mm truss sections were got from a local plumbing store , the most expensive part of the whole scope .
Planet killer for sure and its outside and being used in no time , on that the pipe fitting EQ head is so smooth , sturdy and easy to use , the whole scope is a joy to use easilly taking 300x on the moon , jupiter etc . .
Oh yes the dumbbell counter weights were got from a second hand store for $20 , a perfect size and weight .
Here she is in the scope room along with my 10inch f/10 newt ( the 2 sections of 12 inch ducting tube ) my 6inch refractor and ED80 .
I love building scopes , I have more but cant find the photos yet .
Brian.

Edited by beanerds (04/26/13 07:49 PM)


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cpr1
professor emeritus
*****

Reged: 03/24/12

Loc: Louisiana
Re: Post your home made scope new [Re: beanerds]
      #5825238 - 04/26/13 08:08 PM

That's really cool Brian. Do you have a shroud made for it?

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beanerds
sage


Reged: 07/15/08

Loc: Darwin Australia
Re: Post your home made scope new [Re: cpr1]
      #5825586 - 04/27/13 01:28 AM

Na , no shroud as the primary's on both are about 400mm down inside the botton tube sections in both scopes .
The 125mm has awsome contrast , very refractor like in its images .
The 3 long elongated slots on the lower and upper tube sections of the 10 inch are 150mm wide and over a meter long on the top section , I cut these out on my back lawn using a 4 inch angle grinder and many cutting discs , this took hours but works very well , light and strong .
The anodised steel clips (3x) that hold the 2 sections together are from old industrial wet/dry vacuum cleaners at work , another bin find but they are very strong and work well . The OTA is 2800mm long when put together so it made sence to make it in two peices .
Oh yes the 10 inch OTA is fully 360* rotatable as well in the Dob base , it sits on a 'Lazy Susan' type bearing , very smooth and easy to drive , especially at the zenith when the eyepiece is nearly 3 metres off the ground .
Brian.

Edited by beanerds (04/27/13 01:34 AM)


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gmussman
super member
*****

Reged: 09/21/12

Loc: Cincinnati, Ohio
Re: Post your home made scope new [Re: beanerds]
      #5827483 - 04/27/13 11:22 PM Attachment (93 downloads)

OK, here's mine. It's pretty ordinary, but its my first truss dob, so I'm plenty proud. It all collapses down so I can get to dark sky. I just completed it this week.

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gmussman
super member
*****

Reged: 09/21/12

Loc: Cincinnati, Ohio
Re: Post your home made scope new [Re: gmussman]
      #5827491 - 04/27/13 11:24 PM Attachment (68 downloads)

And here it is with the UTA in the mirror box, and the mirror box sideways in the rocker.
I'm not sure why the photos are turning sideways in the posts, so sorry about that.


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beanerds
sage


Reged: 07/15/08

Loc: Darwin Australia
Re: Post your home made scope new [Re: gmussman]
      #5829551 - 04/29/13 04:52 AM

Nice scope Gmussnan ! you should be plenty proud .
Those GSO mirrors perform very well I have never seen a dud and I have looked thru plenty .

Clear skies mate .
Brian.


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gmussman
super member
*****

Reged: 09/21/12

Loc: Cincinnati, Ohio
Re: Post your home made scope new [Re: beanerds]
      #5829913 - 04/29/13 10:58 AM

Thanks, Brian. I'm optimistic about the mirror -- it's been cloudy and rainy since I finished the scope so I figure it must be good!

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Larry Silvestri
member


Reged: 01/29/13

Re: Post your home made scope new [Re: beanerds]
      #5837175 - 05/02/13 08:26 PM Attachment (76 downloads)

Nice job on your long newtonian! I can't say that I ever made every part of any of my scopes. Here is a better picture of me and my 6" f/12. It is Hastings tube with a Moonlight focuser.

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