[ATM] 2" 45 Degree Erecting Prism?

["David Sleeter" <d.sleeter@roadrunner.com>]

Hi again Folks:

Per my previous post and your helpful suggestions, I'm making progress on my
cheap-public-terrestrial telescope concept. I've settled on an inexpensive
80-82mm. objective and a 32-35mm. eyepiece. To create an erect image, if I
use a 1-1/4" eypiece, I can mate it with an inexpensive Celestron 45 degree
erecting diagonal ($39.00), and that would provide a nice view and a
comfortable viewing angle.

But for a SPECTACULAR VIEW, I'd rather use a 2" 32mm. eyepiece. The problem
is that I'd need a 2" 45 degree erecting diagonal, and the only ones I've
found so far are made by top-of-the-line manufacturers like William Optics
and Televue, and they sell for $150 to $200. Does anyone know of someone who
sells an inexpensive(i.e. made in China) version of a 2" 45 degree diagonal?

Another option would be for me to just buy the prism and make the rest of it
myself. Though I've never taken one apart, they LOOK like the prism inside
might be a simple BK7 wedge with a 22-1/2 degree angle between the faces. Am
I correct in my guess, and if so, does anyone know where I can buy one?

David Sleeter/Moreno Valley, CA


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