From: Jim Chung <jim_chung@sunshine.net>

Date: August 15, 2010 12:14:37 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] a split personality


Alan,




As usual fantastic imaging and processing.  Did you mount your SM90 off axis to your AP Mak?



Jim



Quoting Alan Friedman <alan@greatarrow.com>:


Hi all,


I used this week's hot, humid and sometimes sunny weather to experiment with my 10" mak/cass and the photogenic little sunspot region 11903:


http://www.avertedimagination.com/img_pages/split_personality.html

(you can seen the full size pictures by clicking on the image panes)


This spot had an earth-sized umbral core... not particularly newsworthy - but it did perform a nice split over several days and made an interesting subject if you brought the magnification up high enough. The seeing was never very good - but the gentle morphing and bloating frame to frame allowed reasonably accurate stacking. And although the granulation was only hinted at in a handful of frames, doing multiple alignments with the bright bits of faculae allowed the convection cells to rise to the surface with a little unsharp mask.


be cool,

Alan