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A SOLID 30 mm F/10 Schmidt Cassegrain

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#51 dweller25

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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:



#52 Jon Isaacs

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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



#53 rik ter horst

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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

  • Layout Solid 30 mm F10 SCT.jpg


#54 gitane71

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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 !!!   



#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?



#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....

#57 gitane71

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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 !!  



#58 JohnH

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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?



#59 Laika

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Posted 01 September 2015 - 01:11 PM

How cool, now for your next project, a mini reflex finder :)

#60 rik ter horst

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Posted 10 September 2015 - 11:52 AM

Thanks :-) what about an ADC? ;-)

#61 siriusandthepup

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Posted 11 September 2015 - 05:32 AM

Though certainly not as cute or compact as Rik's, these things are available for you to play with:

 

http://www.ebay.com/...=item1c582e64ed

 

http://www.ebay.com/...=item35f0deb3bf

 

add your own mount :lol:



#62 Grimnir

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Posted 31 January 2016 - 05:30 AM

The most amazing thing I've ever seen on CN!

 

Utterly gob-smacking!

 

Graham




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