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Portaball - new owner with questions

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52 replies to this topic

#51 mjgillen

mjgillen

    Explorer 1

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Posted 22 October 2020 - 09:40 AM

I was looking at that one Jon. Gotta find the specs to see what the height is on that one however looks like a winner so far...



#52 John Miele

John Miele

    Skylab

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Posted 22 October 2020 - 06:44 PM

I had a Wilkinson 6" f7 mirror several years ago and it was a superb performer. He makes top notch optics...

 

cs...John



#53 Jae

Jae

    Apollo

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Posted 25 October 2020 - 03:19 PM

 

 

My PB is the best visual scope I have ever used in its aperture class.  

 

Ditto that.  I have one of the early 12.5 with an aluminum ball with an incredible Pegasus mirror.  Peter was so proud of the test report he provided with it.  I thought ok, 1/37 or something like that was probably beyond any reasonable measurement I could get behind.

 

Then I had a view of Jupiter one night with a binoviewer which was tricky to use. Peter was going to make me shorter truss but then he said I needed to add a lot of weight to the bottom so I never bothered. 

 

The view was really like a Hubble photo, so incredibly memorable with colors, swirls, details within GRS.  I thought of taking this mirror and building a truss newt ota, so I could EQ mount it and it would be the finest 12.5 inch visual instrument for planetary work.


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