Re: On AP Telescopes

Roland Christen

Biggest standard refractor was a 10" Triplet.
Biggest refracting system we made was the 12" Honders which used 2 refracting lenses of 12" aperture along with a folding mirror and a 3rd element of 4" aperture near the focus. This telescope is a variation of the Schupmann Brachymedial that dates back to the 1890's.


-----Original Message-----
From: M Hambrick <mhambrick563@...>
Sent: Mon, Nov 22, 2021 5:15 pm
Subject: Re: [ap-gto] On AP Telescopes

I seem to recall seeing a post on the forum where Roland said that it was really hard to get suitable glass for the larger lens sizes. Is that still the case Roland ? I remember that Astro-Physics sold a limited number of 205 mm refractors. What is the biggest refractor lens you ever made ?


Roland Christen

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