Without the diffraction spikes (and less bluriness) then possibly
performance on the moon/planets is better than the normal newt,
at substantially less cost than the corresponding apo?
--- Peter Santangeli <peter@No-Spam> wrote:
>
> I'm confused. I just read the S&T article on Orion's 3" off axis reflector.
> I was actually interested in this, because it is clearly so unusual. From
> the article though, when compared to Orion's *cheaper* 6" newtonian, it has:
>
> - less light grasp (obviously)
> - the same size tube
> - (surprisingly!) less contrast
>
> What am I missing here? Apart from it being gimicky, what advantages does it
> offer the observer?
>
> Pete
>
>
Received on Mon Mar 7 13:17:05 2005