Re: [APML] Trifid at 4000mm

[George Anderson <georgea@cam.org>]

Really nice work Jason.
Does the Meade field de-rotator use inputs from an auto-guider to
determine how much rotation is needed or does it contain it's own guide
sensor? Or does it rotate based on lat/lon and alt/az information?
Also was the tech-pan done with H-A filtering?
At an Fl of 4 metres and 3.5 hours exposure it is really impressive.

George Anderson
Montreal Canada

Clear skies and good health


Jason Ware wrote:
> 
> Meade 16" LX200, alt/az with field derotator at f10
> 
> 2x60 minutes hypered Kodak PPF 400
> 1x90 minutes hypered Kodak Tech Pan
> 
> http://galaxyphoto.com/temp/jw_trifid_meade16.jpg
> 
> --
>  -Jason Ware
> 
>  ---------------------------------------------------------
>        VISIT MY ASTROPHOTOGRAPHY HOMEPAGE!!
>     ASTRO IMAGES FOR DOWN-LOAD, TIPS, REPRINTS
>          URL: http://www.galaxyphoto.com
>  ---------------------------------------------------------
>        My Other Hobby....High Power Rocketry
>       URL: http://www.galaxyphoto.com/rockets
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo