Observations with 18-inch 24th of NovemberPosted By Don Wyman |
And this was an 18" what, exactly?
Observations with 18-inch 24th of NovemberPosted By Don Wyman |
My new toy is on the way!!Posted By Don Wyman |
I'm In Way Over My Head...Literally!Posted By Don Wyman |
My New scope!Posted By Don Wyman |
Night vision goggles for meteorite viewing?Posted By Don Wyman |
J. Allen Como said:
I just heard from a friend of a friend who has night vision goggles who described some pretty amazing sights while looking at the night sky last night. Has anyone on this forum tried this?
Allen
Barlowed laser CollimationPosted By Don Wyman |
New Moderator!Posted By Don Wyman |
Re: Refractory history questionPosted By Don Wyman |
Greg Nowell said:
Here's a picture of Lord Rosse's secondary mirrors. (I was at Birr Castle last week). So when his mirrors were fresh he was at roughly 50% light throughput, but apparently this would rapidly degrade to 16%. regards Greg N