From: Phil Houston <pkh111@knology.net>

Date: May 1, 2006 7:58:26 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] big sun

Alan

Very good solar image!  It's hard to believe that it was made from single frames.  I've manually assembled mosaics, which is a lot of work, and was wondering if you use software to automate the process, other than Photoshop.  Either way that is a superb image.  Thanks.

Any timeframe as to when AvertedImagination will be up?

Phil

On May 1, 2006, at 1:47 PM, Alan Friedman wrote:

Hi all -

Thought I would share this  weekend project with you.

http://www.avertedimagination.com/images/sun042906large.jpg

The daytime seeing - with big spring temperature swings - has been very 

difficult for high resolution solar imaging. It was futile to try and 

align even two frames to improve S/N - the variation were too great and 

detail was hopelessly blurred. But a single solar frame with the DMK 

was quite good. I imaged the entire disk with my 90mm filter and 5" 

refractor (1000mm FL) and chose one frame from each. I used three light 

processing steps in Photoshop and then combined the sixteen frames into 

this mosaic.

When the seeing is bad, it is fun to step back a bit for a wide field 

view.

best wishes -

Alan