Hi Folks. Just curious question...with Black Friday and Christmas sales here, many Folks may purchase a small or high quality refractor telescope. Most Folks being anxious to try the scope out ASAP and running into days if not weeks of cloudy night skies, will try some terrestrial viewing. With that said and many of us refrator owners have done this...what advice can be offered of what to look for when doing some terrestrial viewing that can be good or bad indications of the quality of the scopes primary optic lens, until a star test or clear night sky viewing can be had..
True part of this will be the quality of eyepiece used as well as checking for CA (Chromatic aberration) around terrestrial objects such as tree branches, leaves, roof tops and towers, but what other things should one check for visually that are good or bad initial signs of the scopes primary glass lens quality?
Edited by emflocater, 29 November 2019 - 03:41 PM.