29 Oct
2013
29 Oct
'13
1:12 p.m.
Thats another term for it, Joe. Some people shoot the beam straight down the tube back at the primary, then out the side with a diagonal. I think that's the way JMI does it on their monster Newtonian. Mike has saved himself having to use a third large pricey mirror by doing it this way, and just uses a 2" star diagonal as a tertiary mirror to put the eyepiece at 90-degrees to the optical path. On Tue, Oct 29, 2013 at 1:07 PM, Joe Bauman <josephmbauman@yahoo.com> wrote:
Is that what's called a folded Newtonian?