On Dec 24, 2018, Paul Schlyter wrote
(in et):

On Mon, 24 Dec 2018 09:26:32 -0500, wrote:
20/20, or metric 6/6 = 1. It's explained at
https://en.wikipedia.org/wiki/Visual_acuity#Measurement.

Ok, so it measures the visual acuity at a distance of 20 feet. But
wouldn't a measure of (practically) infinite distance be more
interesting to skywatchers? No stars are only 20 feet away.

It is always nice to be able to actually FIND your telescope so you can look
at the sky. ;-0

--
Harry F. Leopold

The Prints of Darkness (remove gene to email)

“Damn. Someone's been ****ing in my genepool again.“-Kermit