From: Milton Aupperle <milton@outcastsoft.com>

Date: October 5, 2010 9:05:00 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] LRGB Color version of NGC 6995 Veil East

Hi Jim;

Thanks.

Even with the IDAS Hutech LPR filter (reduces the light pollution by ~ 220%) , I'm getting sky glow of 18,000 out of 65,535 for the luma images with 15 minute exposures, so the lower 1/3 of the image is brightness is light pollution With out it, the sky glow would be about 40,000 and basically you would see no nebula at all, just stars. That's on a good clear night and if there is any haze, the light pollution can easily double or higher.

TTYL..

Milton Aupperle

On 5-Oct-10, at 4:51 AM, Jim Chung wrote:

Hi Milton,

Impressive work, especially from the city.

Jim

Quoting milton_aupperle <milton@outcastsoft.com>:

Hi Folks;

I had some time this evening to work on the LRGB Color version of

NGC 6995, which is the south part of the East veil nebula.

http://tech.groups.yahoo.com/group/Astro_IIDC/files/DSO/NGC6995_LRGB_20100930_MJA.jpg

Despite the weird turbulence issues, it turned out better than I expected.

It's really weird the way the same strands change color back and

forth from Red to Green.

TTYL..

Milton Aupperle