Re: Roland's October 1981 Sky & Telescope article: "An Apochromatic Triplet Objective"

Jay Freeman

I can (barely) remember when rotary phones would have been called "high-tech", except that the term had not been invented yet. Would you folks know what to do if you put a phone to your ear and heard someone saying "Number, please"? (Wouldn't that be a cute feature when opening a 'phone app?)

And there are still plenty of telescope mirrors that predate Roland's triplets, and even predate Roland, that are still doing yeoman duty today.

-- Jay Reynolds Freeman
(personal web site)

On Feb 23, 2021, at 12:41 PM, ROBERT WYNNE <robert-wynne@...> wrote:

Anyone seen a video of a millennial attempting to use a rotary phone for the  first time without instruction? Hilarious. What we take for granted is already lost to the ages. -Best, Robert
On 02/23/2021 12:27 PM James Stone <jrs7r@...> wrote:

It’s amazing how useful a Christen triplet from that era remains as compared other contemporary technological innovations such as the rotary dial telephone. Some things really do stand the test of time.

Join to automatically receive all group messages.