Re: ATM Optics for a good mirror

[spooner@page.az.net (Michael Spooner)]

lifedata@vol.com wrote:
> 
> While looking around at eyepieces I noticed that Tele Vue Plossls
> cost much less than Tele Vue Panoptics ($100 vs $250).
> 
> The Panoptics have a much wider apparent field of view.  Is this all
> you get for the more than double price or are there other advantages.
> 
> Jim L
> 1 John 5:13

For faster mirrors, the Panoptics control astigmatism far better than
Plossls (even TVs). Eyepiece astig is the principle abberation that
flaws widefield views. Coma is a distant second.

Mike Spooner