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A SOLID 30 mm F/10 Schmidt Cassegrain

Started by rik ter horst , Feb 04 2013 09:05 AM

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61 replies to this topic

#51 dweller25

Mercury-Atlas

Posts: 2,923
Joined: 30 Aug 2007

Posted 03 May 2015 - 01:29 PM

40% obstruction - geez the planetary performance won't be good :lol:

Just kidding - that is an exceptional piece of work :waytogo:

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#52 Jon Isaacs

ISS

Posts: 120,057
Joined: 16 Jun 2004

Posted 03 May 2015 - 01:40 PM

Is this the Rik Ter Horst from Opticon-fame in the 1980´s.
Who made the SCT´s in Holland back in the day??

:waytogo:

The one and the same. I believe he is still building yet another "ultimate" SCT..

I am not a big fan of SCTs but I would dearly love to take a look through an Opticon, it's a different animal..

Jon

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#53 rik ter horst

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topic starter

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Posted 08 May 2015 - 08:11 AM

Thanks all for your kind comments!

Below an optimized example of the Solid Cat shown in this thread with diffraction limited image quality (black circle represents the airy disc).

Have fun Mike! ;-)

(I hope the image below has sufficient resolution....)

Attached Thumbnails

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#54 gitane71

Viking 1

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Posted 24 May 2015 - 08:25 AM

ya, 'goto', attach a camera, and well, it Could be done..... launch it into space. You'd have the first independently owned amateur space telescope.

that is REALLY neat !!!

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#55 gitane71

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Posted 24 May 2015 - 08:29 AM

and I'll bet you made the aluminizing chamber out of an old tobacco tin, right?

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#56 rik ter horst

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Posted 24 May 2015 - 09:36 AM

Exactly! First I tried a Coca-Cola can but they implode....
But to be honest, filling a quite large vacuum chamber with only a tiny piece of glass felt somewhat stupid....

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#57 gitane71

Viking 1

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Posted 24 May 2015 - 09:51 AM

but it almost had to be that way. It is small enough that even Painting the aluminum on would be difficult !!

Just plain NEAT !!

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#58 JohnH

Skylab

Posts: 4,071
Joined: 04 Oct 2005

Posted 24 May 2015 - 10:26 AM

Thanks all for your kind comments!

Below an optimized example of the Solid Cat shown in this thread with diffraction limited image quality (black circle represents the airy disc).

Have fun Mike! ;-)

(I hope the image below has sufficient resolution....)

Did it need local retouching?