From: Milton Aupperle <milton@outcastsoft.com>

Date: July 31, 2008 3:38:15 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Re: First Light with PGR GRAS14S5M Camera-Filters????

Hi Perry;

I mentioned that I used an IDAS LPR filter in the long winded description of the First Light imaging, and why I used it too.

HTH..

Milton Aupperle

On 31-Jul-08, at 3:06 PM, hpholcomb wrote:

Milton,

Sorry, for some reason I though you were in Toronto!  Yes, Calgary is "up there"!

Since you must have become somewhat of an expert at dealing with anthropogenic (being

a geologist, you'll appreciate that adjective!!) light pollution, do you use any filters in your

work?  You may have mentioned them in other posts, but this would be a good place for

restating that.

Thanks.

Perry