From: Milton Aupperle <milton@outcastsoft.com>
Date: February 7, 2009 12:12:23 PM MST
To: Astro_IIDC@yahoogroups.com
Subject: Re: [Astro_IIDC] First Lunar Image with Grasshopper Mono Camera
Hi Ray;
The Full size one isn't great.
http://groups.yahoo.com/group/Astro_IIDC/files/Lunar/Luna_FullSized_20090204_MJA.jpg
I had "boiling" turbulence, which looks similar to the surface of a pot of lightly boiling water, basically irregular hot bubbles rising rapidly to the surface. This made individual craters / mountains etc move +/- 10 Arc seconds from their neighbors. Doing multiple Alignment points (20 to 30 each per final image) allows Astro IIDC to compensate for this to some degree, because it does each alignment area separately.
Also reducing the original image size is a pretty common thing with DSLR camera users too. It makes their stars look sharper, improves edge contrast, hides noise and masks tracking issues, especially since they scale them down by a factor of 3x to 4x times.
TTYL..
Milton J. Aupperle
President
ASC - Aupperle Services and Contracting
Mac Software (Drivers, Components and Application) Specialist
#916, 742 Kingsmere Crescent S.W.
Calgary Alberta T2V2H8
1-(403)-453-1624
www.outcastsoft.com
On 6-Feb-09, at 3:18 PM, Ray Byrne wrote:
Hi Milton,
That is one fine image of a waxing Moon. I'd like to see the full-size version.
On 6 Feb 2009, at 20:56, Milton Aupperle wrote:
