Richard Crisp wrote:
it's the filter I had handy :-)

http://www.narrowbandimaging.com/com...olmes_page.htm

I got thinking later (after the clouds rolled in) that I should have
done that for the lum image. But at the time I didn't know it was
mostly dust we were seeing not gas. That's usually so far out of the Ha
passband to be invisible.

I leave for a few days starting tomorrow so can't follow it but then the
clouds are to be back so it doesn't much matter.

Rick


--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".