[Satchmo]

I am very interested in the Hubble 20" Ultra Light as it ticks all the boxes. It's shown here:

http://hubbleoptics.com/UL20.html

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At those prices and fast focal ratios and using plate glass - with no optical guarantee or optical certification that can be challenged , I would say you would have to take the claim of 0.95 Strehl with a grain of salt . The structure certainly looks light.