Forum Index » Make Your Own Gear » MYOG Light telescope.


Display Avatars Sort By:
a b
(Ice-axe)
. on 08/11/2012 14:52:29 MDT Print View

.

Edited by Ice-axe on 10/18/2012 19:29:35 MDT.

James Cuppy
(Kentuckian) - F
Congrats on 08/12/2012 07:42:27 MDT Print View

Congratulations on finishing up the mount for your reflector! Looks like fun!

Clear skys to you.

Ken Thompson
(kthompson) - MLife

Locale: Behind the Redwood Curtain
Re: MYOG Light telescope. on 08/12/2012 07:46:36 MDT Print View

Very cool Matt.

Nearly full Moon during the GGG. Just saying.

Tim Zen
(asdzxc57) - F

Locale: MI
Re: MYOG Light telescope. on 08/12/2012 21:03:07 MDT Print View

Matt. Beautiful. Thank you for posting.

I have a 6 inch mirror gathering dust too. Mmmm.....

a b
(Ice-axe)
. on 08/15/2012 19:52:02 MDT Print View

.

Edited by Ice-axe on 10/18/2012 19:30:06 MDT.

Doug I.
(idester) - MLife

Locale: MidAtlantic
Re: MYOG Light telescope. on 08/15/2012 19:56:56 MDT Print View

Matt,

This is very, very cool! Good on ya!

a b
(Ice-axe)
. on 08/15/2012 20:31:06 MDT Print View

.

Edited by Ice-axe on 10/18/2012 19:30:37 MDT.

Kevin Beeden
(captain_paranoia) - F

Locale: UK
suggested name... on 08/16/2012 06:12:56 MDT Print View

Following the Krustyledge, can I suggest the 'KrustyScope'...?

I can see my afternoon occupied with KrustyScope thoughts...

a b
(Ice-axe)
. on 08/16/2012 07:51:54 MDT Print View

!

Edited by Ice-axe on 10/18/2012 19:31:11 MDT.

Kevin Beeden
(captain_paranoia) - F

Locale: UK
thoughts... on 08/16/2012 11:28:19 MDT Print View

See, I knew I'd spend the afternoon thinking...

I imagine that the main strength is required in the primary mirror support, and the pivot. The support structure for the secondary mirror and eyepiece can probably be a lot less sturdy, so you might drop two of the six support arms. You might even knock it down to three arms, provided you can maintain the rigidity required to keep the optical alignment. I was scribbling ideas with 45-degree Y-unions and 135-degree elbows to provide a stepped support structure for a 3 or 4 arm support...

The 45-degree Y-unions might also allow a triangulated cross-bracing. You might even used a diameter reducing union, so that the cross-bracing is a smaller diameter...

I spent ages playing with the design of the Krustyledge, modelling it in SketchUp, fiddling with different setups. But I don't do big wall climbing, so I don't need a Krustyledge.

I haven't got a 6" mirror, or secondary, or eyepiece, and I don't really do astronomy, so I don't need a KrustyScope.

I have to keep telling myself that I don't need these things, and stop trying to design them...

a b
(Ice-axe)
. on 08/16/2012 22:22:10 MDT Print View

.

Edited by Ice-axe on 10/18/2012 19:32:03 MDT.

a b
(Ice-axe)
. on 09/30/2012 22:28:09 MDT Print View

.

Edited by Ice-axe on 10/18/2012 19:32:52 MDT.

michael levi
(M.L) - F

Locale: W-Never Eat Soggy (W)affles
looks fun! on 09/30/2012 22:38:46 MDT Print View

You can't touch em but you sure can get a closer look. Very nice by the way!

Roger Caffin
(rcaffin) - BPL Staff - MLife

Locale: Wollemi & Kosciusko NPs, Europe
Re: MYOG Light telescope. on 10/01/2012 01:13:46 MDT Print View

Very nice, but I couldn't help thinking to myself 'carbon fibre tubing and sheet'. Stiffer and lighter than PVC ...
Ignore, just me.

Cheers

a b
(Ice-axe)
. on 10/01/2012 07:41:39 MDT Print View

.

Edited by Ice-axe on 10/18/2012 19:28:58 MDT.

Kevin Beeden
(captain_paranoia) - F

Locale: UK
lightweight mirror on 10/01/2012 11:18:12 MDT Print View

Many years ago, I thought about playing with a very lightweight mirror created using a flexible, metallised plastic (e.g. acrylic mirror 'glass'), mounted onto a vacuum ring system. You'd pump out air from behind the mirror, and the mirror would flex due to the air pressure. I think I managed to convince myself that the shape ought to be parabolic, but I'm sure I could be wrong.

Ideally, you might even be able to use metallised mylar 'space blanket', provided you could stretch it tight, drum-stylee, to remove the wrinkles.

As with most of my ideas, I never got around to experimenting, but it certainly offered the hope of a light, cheap, easy to manufacture mirror.