From: Milton Aupperle <milton@outcastsoft.com>

Date: August 10, 2010 11:40:48 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Re: Live image alignment method ...

I missed the "Live" part as it's not part of the message body.

No we don't do live rotation and you'd need to select the stars to use for rotation each time you made a change to the image properties. You'd also need to make sure the rotating stars don't slide out of the FOV too.

Secondly, de-rotation likely isn't going to be a major issue if your doing this in a < 30 second exposures. Unless your confusing poor tracking with de-rotation?

In Binned 4x4 mode,  with 1 to 10 second exposures (in 4x4 mode, your getting effective exposures of 16 times the actual) with moderately high gains, you would not need alignment anyhow. And our "binned" modes don't reduce the image size either like other apps do.

You can also do live sum alignment stacking of multiple frames with Live alignment too, and then it can automatically display the summed frames.

HTH..

Milton J. Aupperle

On 10-Aug-10, at 11:24 AM, yvesvandenbroek wrote:

Thanks,

I was looking for a "Live" solution like:

http://www.coaa.co.uk/astrovideo.htm

It will do this in realtime, so one window shows one individual frame, each time a new one comes in, and next to it the stacked de rotated image ... that gets better with each frame that comes in.

Really nice for star parties and public outreach.