Chuck is right about the cost, a PST is the least expensive. Most on the market require a long focal length, the one the belongs to SLAS requires a f30 scope. Lumicon sells one, and I kenw someone who used it with a 6" f10 refractor, but it does not perform as well as the PST.
Rodger Butz researched some alternatives but found nothing better than the PST or Day Star. The clubs H-alpha is going to be mainly used on the Andy out at SPOC. Jim, I just don't know. I doubt that you could set up the 80mm or 100mm
ED scopes for less money than the PST, which is why I went that route. Rob or Kurt, or others on this list more familiar with the current crop of commercial products could probably tell you what can be had, and for how much.
The cheapest way, of course, is to borrow the SLAS H-a setup.
One of these days I still want to build an old-fashioned spectrohelioscope, using a small refractor and diffraction grating. See promineces the way amateurs did back in the '50's and '60's. Jack Newton published a simple one in S&T back in those days that I will probably copy fairly closely. Another project for the retirement bucket, lol.
On Tue, Jun 16, 2009 at 6:14 PM, jim Gibson <jimgibson0@gmail.com> wrote:
Chuck,Is there a way to hook up a H-Alpha to the 80mm for sun observation that doesn't cost $2500?
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