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StarStructure Telescopes / LARGE APERTURE SCOPES

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#51 michael

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Posted 27 January 2014 - 06:01 PM

Hi All,
WOW...can't believe that it's been more than 2 months since my last post on the 36"...Anyway finally was able to get back into it and started the UTA today. Hopefully we'll have the 36 standing by week end. :jump:

Mike

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#52 michael

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Posted 29 January 2014 - 05:54 PM

Pic of OTA. The OTA came out right at 12' from back to front.

Mike

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#53 skyward_eyes

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Posted 29 January 2014 - 07:24 PM

Yep that would take care of my big scope needs... Maybe one day.

#54 michael

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Posted 30 January 2014 - 04:28 PM

Here is a pic of her standing.

Mike

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#55 michael

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Posted 01 February 2014 - 09:26 PM

I think this shot gives you a real perspective on size.

Come on...I'm not really that small!!! :bawling:

Mike

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#56 skyward_eyes

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Posted 02 February 2014 - 08:24 PM

Wow! That's impressive.

#57 Bob S.

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Posted 04 February 2014 - 08:52 AM

Mike, That is one impressive HUGE telescope! Keep up the good work. Bob

#58 MDavid

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Posted 04 February 2014 - 10:43 AM

Great Pic! With this telescope its owner will not only SEE the stars but also BE a star!

I think a scope of this magnitude should have a name.

Keep those pics coming...

#59 Starman1

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Posted 04 February 2014 - 11:16 AM

Couple of questions/comments:
1) Given that the angle of the top of the mirror box is tilted quite a bit from the angle of the center line of the scope itself, shouldn't the opening in the mirror box be elliptical in order to present a round hole to the primary to secondary light cone?

2) It would seem that sandwich mirrors need very firm support at the edge of both upper and lower plates in order to prevent astigmatism. But, in this size, I can also see lateral sag in the inter-plate support blocks would pull on the upper and lower plates and cause a "dimpling" of the mirror surface.
The 18" sandwich mirror I saw in the 18" Sky-Watcher at ASAE had, at least, a large number of cylinders between the upper and lower plates, as well as firm edge supports for both plates--plus, it was much thinner from front to rear. Of course, not having seen the mirror, I have no idea what the number and nature of inter-plate connectors is on this 36". I would be really afraid that lateral sag in the inter-plate supports would play havoc with the mirror surface. I wonder why the mirror is that thick from front-to-rear?

#60 Relativist

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Posted 05 February 2014 - 02:22 PM

Couple of questions/comments:
1) Given that the angle of the top of the mirror box is tilted quite a bit from the angle of the center line of the scope itself, shouldn't the opening in the mirror box be elliptical in order to present a round hole to the primary to secondary light cone?


Very astute, the light cone will form an ellipse, one of the very definitions of an ellipse is a conic section at such an angle. That said, as long as a circular cut out had a diameter greater than the major axis of the described ellipse there would not be interference to the light cone. Note that, such a circular opening will appear elliptical at the eyepiece.

#61 michael

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Posted 05 February 2014 - 05:47 PM

Hi Don,

Yes the opening on the mirror box will be oval. I think you and I had this conversation in an earlier thread. The building of the 36” is basically being shown in real time. These type of questions will be answered as I go.

Question 2- I answered this on post # 6054301

“Truth is...it's a big unknown.

Another twist to the equation is that both front and back plates are slumped the same amount. So the back of the optic is curved, same as the front. This pretty much takes away all conventional cell point theory.

With that said...All the specs for the cell have been provided by the owner, both cell points and edge support. I am building the cell to spec and take no responsibility for the performance of the optics. It was the only way I agreed to build the scope.”

Mike

#62 Steve Harris

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Posted 06 February 2014 - 01:32 PM

Hi Mike,
I like the floating edge support pictured on the first page. Is the floating edge support standard on these Horizon scopes or was that a one-off for the sandwich mirror?

#63 michael

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Posted 08 February 2014 - 04:08 PM

Hi Steve,
If your referring to the cell photo posted on this thread...The yes, this is spec built for this mirror only.

Here is a pic of a standard 18 point Horizon mirror cell.

Mike

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#64 michael

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Posted 09 June 2014 - 08:29 AM

Hi All,
The 36" is in it's final stages...Picture showing the mirror lifting straps that will be installed under the primary optic. A 4 point lifting cradle will be made so the owner can lift the optic on his own.

Mike

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#65 michael

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Posted 21 June 2014 - 05:04 PM

Near finished 36"

Mike

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#66 michael

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Posted 21 June 2014 - 05:06 PM

36" standing.
:bigshock:
Mike

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#67 mogur

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Posted 21 June 2014 - 06:40 PM

How long are the longest truss poles? If they're too long to fit in a standard 8' truck bed (even diagonally) I don't see the advantage to this design. I know it has a smaller footprint but you're going to need a truck (or trailer) to transport it anyway.

#68 michael

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Posted 24 June 2014 - 03:17 AM

Hi Mogur,
Longest truss pole is 120". The truss length has to do with the focal length more then the design. It's a 36", I'm thinking a trailer is pretty much a given regardless of the truss length.

Mike

#69 michael

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Posted 24 June 2014 - 03:49 PM

Finished... :jump: The material for the light shroud measured 11' long x 15' wide to make the tube. Took 11 yards of material.

Mike

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#70 FrankG

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Posted 24 June 2014 - 05:58 PM

Mike, sorry if I missed it earlier -- can you say what part of the U.S. or world is it headed for?

Thanks,

Frank

#71 michael

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Posted 25 June 2014 - 09:04 AM

Hi Frank,
It's going to Canada.

Mike

#72 FrankG

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Posted 25 June 2014 - 11:11 AM

;)Thanks -- you put a heater in it?

#73 michael

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Posted 26 June 2014 - 11:20 AM

Hi Frank,
Not yet...still waiting on the secondary to get back from the coaters.

Mike

#74 Steve Harris

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Posted 15 August 2014 - 03:01 PM

Just FYI for anyone interested, Mike redesigned his site recently.  Now he has a section where he posts in the shop pictures of the StarStructures currently being built.

The pics show a lot of details giving an idea of the build quality.  Fun to watch, especially when you know that one of them is probably yours :lol:

 

Also see if you can spot the one part of the scope that is wood :shocked: ... ;)


Edited by Steve Harris, 15 August 2014 - 03:03 PM.


#75 Jaxdialation

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Posted 31 August 2014 - 09:25 PM

Glad I found this post, Google was pointing me to the wrong site for SST!

 

Nice to see Mike is still custom crafting the best scopes in the world!








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