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Old 03-11-2020, 10:53 AM
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madbadgalaxyman (Robert)
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madbadgalaxyman is offline
 
Join Date: Mar 2011
Location: Brisbane
Posts: 936
Question

Hi James,
Is that a 25mm thick primary in the very nice German scope?

I confess I'm having lots of trouble with that German language!

How much does this primary mirror weigh?

.....I know little that is detailed about supporting extremely thin Primary Mirrors, except for the "obvious" ( such as supporting it on lots of points!!).
But the reduction of the primary mirror weight, to an absolute minimum, seems a worthy goal for telescope designers and builders.

Maybe there is still room for innovation in this aspect of telescope design?
After all, with the E-ELT, our professional cousins have taken weight reduction to the extreme and divided its 39 meter Primary mirror into 798 segments!
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