Re: Roland's October 1981 Sky & Telescope article: "An Apochromatic Triplet Objective"
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It's from a time when people actually looked thru a scope with things called eyepieces (and had telephones attached to walls, with rotary dials on them).
From: Pete Lardizabal <p14@...>
Sent: Tue, Feb 23, 2021 1:52 pm
Subject: Re: [ap-ug] Roland's October 1981 Sky & Telescope article: "An Apochromatic Triplet Objective"
Many thanks James!
Read this long, long ago in a land far, far away.
On Feb 23, 2021, at 2:03 PM, James Stone <jrs7r@...> wrote: