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Optical quality of meade mirrors that mounted on the Starfinder 16 "in the years 2001

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#26 Pinbout

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Posted 10 February 2018 - 04:24 PM

Not the only way he signed mirrors

 

IImage.jpeg



#27 Pinbout

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Posted 10 February 2018 - 04:43 PM

And like the Meade’s I’ve seen, most likely later in his career with nothing to prove

 

5633D779-9306-42A7-9346-B1DA6F013694.jpeg

 


Edited by Pinbout, 10 February 2018 - 04:43 PM.


#28 Pinbout

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Posted 10 February 2018 - 05:36 PM

The only mirror that will come close to that 16” f4.5 for that price and that performance is this 14” Hubble optics mirror on ebay

 

https://rover.ebay.c...tm/192374155159

 

i have a 12.5” ho and it is very good. When they 1st started they rushed the polish and got bad reputations. But since then they put a lot more effort in producing a good product.

 

https://youtu.be/H8H4622hBlQ

 

i have another 16” 4.5 Meade that I haven’t tested yet but it has a large shallow clamshell chip in the back and I plan on grinding it out and refiguring it. Never sell it for as low as $850 that’s for sure.


Edited by Pinbout, 10 February 2018 - 05:38 PM.


#29 pastorgalactico

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Posted 11 February 2018 - 06:16 AM

Hello;
After what I've seen, I'm going to buy new optics in Europe and at least I have a return guarantee if I do not like optics.
Regards;

J.Tapioles



#30 Pinbout

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Posted 11 February 2018 - 08:35 AM

Wow for a similar mirror from Orion optics uk research grade, much higher price

 

BBE15468-70E7-4127-BE8E-B14934D57E75.jpeg



#31 pastorgalactico

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Posted 11 February 2018 - 08:51 AM

I know.



#32 pastorgalactico

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Posted 11 February 2018 - 09:32 AM

But in Europe there are also craftsmen who make very good optics and with a lower price than Orion optis.
In England, Nikol Optis and in Spain, Joan Lopez.



#33 Pinbout

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Posted 11 February 2018 - 10:06 AM

https://nicholoptical.co.uk/

 

he uses double pass autocollimation. 

 

Thats all i’d Need to know

 

plus in the past I’ve seen bad things about OOUK


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#34 Pinbout

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Posted 11 February 2018 - 10:08 AM

Much cheaper and better quality 

 

but still $2550usd.

 

thats why I learned who to make my own. cool.gif

 

D0C5D4FC-DCBF-469E-950D-9D79140BB92A.jpeg


Edited by Pinbout, 11 February 2018 - 10:11 AM.


#35 pastorgalactico

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Posted 11 February 2018 - 10:09 AM

A nikol or joan mirror is already worth € 2100
But of course they have nothing to do with commercial GSO.


Edited by pastorgalactico, 11 February 2018 - 10:12 AM.


#36 Alvin Huey

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Posted 13 February 2018 - 07:24 PM

 

 

 

BTW, many of you may already know.  Carl Zambuto was John Hall's protege (sp?) when Carl started making mirrors.  

 

 

That's not true and was addressed by Carl once on his mirror group web site. Carl said he never met Hall face to face. They corresponded by email and by phone about the aspects of the the business end of mirror making. Hall never showed him how to make mirrors.


"I never met him in person. I know that sounds unusual, but he was in Texas and I’ve been in Washington State these last 18 years."

 

"So to set the record straight, John Hall did not teach me how to make mirrors. I was already a mirror maker of eight years before we met, but only by hand. I call John my “commercial mentor” because he prompted me to move forward into machine-based production, then he opened the door for me to get into the business, by following behind him with small mirrors as he went on to larger. The instruction he gave me for figuring mirrors was very simple. It was something like, “Start with a 60% diameter lap, go back and forth and use offsets, then go to 50% diameter, and so forth”. That and the short sequence contained in the shop video were what I worked with. It was nothing like what we did when we taught our method here on this forum over a period of years. John did however stand by and continue to coach and give me moral support until I found my magic formula, and that might be the greater part of his contribution to my work and career. What he did for me overall was invaluable, because prior to meeting him the idea of making mirrors for a living was not in the realm of possibility, in my mind. I preciously had no inkling of how it could be done.

We stayed in contact for twenty or so years, right up until his last days in the hospital. We talked on the phone, we wrote back and forth. We talked about everything under the Sun, not just mirror making. He was a good friend, and we had mutual respect for each other. And he never made any issue of what I became. He was only proud to be my friend, and in the later years I had the opportunity to turn the tables and help him many times with things he needed as he wound down his career.

Thanks, John. I will always remember you and honor you for your contribution to all of us, but especially to me.

As John would say,

“Cheers”

Carl Zambuto"

 

Thanks Paul.  I stand corrected and remember this email.  I've been out of astronomy for a while and have not kept close tabs to teh hobby.




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