In the thread about Hanny's Voorwerp, Jimi recommends using the SLoan G filter to boost contrast. Going to Astrodon's website, they have it available in 1.25 inch format and as a 50mm unmounted filter. Is there someplace to get a mount for this filter that's threaded to fit eyepieces/Paracorrs?
Howard
30-inch f/2.7 alt-az Newtonian
https://sites.google.com/site/howardbanichhomepage/
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Contributing Editor, Sky & Telescope magazine
You might ask Don if he would mount it. I have the 1.25 inch one. I don't use a paracorr with the F/4 48" at high power also Jerry and I did not use one with his F/ 3.3 30" when we observed Hanny's.
Clear Skies,
Jimi Lowrey
Fort Davis Texas
48"F4 OMI/TEC
28'F4 ATM
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