From: Alan Friedman <alan@greatarrow.com>

Date: December 13, 2009 3:38:59 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] More fun in the sun

Nice images Jim - thanks for including the image of your Frankensteined PST. You might keep an eye out for a used BF 30 so you can eliminated the diagonal altogether.

The PST etalon is 40mm, right?

best,

Alan

On Dec 13, 2009, at 7:11 AM, jimchung2338 wrote:

I removed the PST etalon and BF5 filter from the rectangular PST body to eliminate the PST prism from the optical path and hopefully improve performance. The optical train as shown is inserted into my AP Traveler with an 80mm Daystar ERF filter on the objective end.

I'm still working on tuning for surface resolution but the prominences show up with nice resolution.

http://tech.groups.yahoo.com/group/Astro_IIDC/files/Solar/PSTmodprominences.jpg

Jim