From: "milton_aupperle" <milton@outcastsoft.com>
Date: June 21, 2005 8:02:06 PM MDT
To: Astro_IIDC@yahoogroups.com
Subject: Solar Images Posted
Hi folks;
I was trying to chase down some tracking issue in Astro IIDC 2.01.00
(hopefully released tomorrow) using the sun limb as my target, so I
also recorded a few gigabytes of video of sunpsot groups 780 (central)
and 779 (on the limb and gone from view tomorrw). They are in the
Files -> Solar folder. This was my firtst attmept at shooting the sun too.
I had to use a wratten 25A filter because I could not run the Unibrain
color camera any lower exposure time than at 0.3 milliseconds with
gains at near zero. With it on, I could asjust the gain a little bit.
I also discovered that you can really improve the contrast and detail
level of your solar images using the "Histogram Expand" option in
Astro IIDC. Unfortunately I didn't record any images with it off for
comparison sake, but basically you could just make out that their were
some low contrast dark blotches visible on the suns disk. With it on,
the sunspots are black, and the granulations and flocculae / phlages
stick out like a sore thumb - as shown in the images.
TTYL..
Milton Aupperle