From: "Milton Aupperle" <milton@outcastsoft.com>

Date: June 19, 2006 4:50:37 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: M17- The Omega (or Swan or HorseShoe or Lobster) Nebula


Hi Phil;


Thanks.


The other fun thing is I'm shooting this off a concrete balcony on a

10th story apartment building.


http://www.outcastsoft.com/AstroImages/Scope01.jpg


http://www.outcastsoft.com/AstroImages/Scope04.jpg



If I stomp my feet on the balcony while imaging, you can see stars

jump +/- 15 pixels with on 750 mm focal length.


TTYL..


Milton Aupperle



--- In Astro_IIDC@yahoogroups.com, Phil Houston <pkh111@...> wrote:


Milton,


Very impressive image,  even more so when considering the sky  

conditions.  You've got to grab them when you can.


Phil







On Jun 19, 2006, at 4:57 PM, Milton Aupperle wrote:


Hi Folks;


After a 3 week drought, it finally cleared up last night (wasn't

supposed to) with reasonably dark skies (about Mag 2), so I was up

until 3:30 am taking images.


Here is a 4 minute exposure stack (12 frames) of M17, which I had to

push image processing wise to bring out the nebula. Transparency kept

falling over time and the background sky glow kept rising. I basically

have to throw out all pixel values below 30,000 out of 65,535 due to

light pollution.


http://groups.yahoo.com/group/Astro_IIDC/files/DSO/ 

M17_20060619_MJA.jpg


All pertinent info is embedded in the image.


Clear skies..


Milton Aupperle