M13 LRGB from AP180EDT f/9 and FLI Proline 3200 with Optec RGB filters

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Taken on April 25, 2008 from my ranch near Mariposa, Ca.

Astro-Physics AP180EDT f/9 imaging scope used at f/9

Finger Lakes PL3200  imaging camera operated at -45C

Robo-Focus Focuser

Finger Lakes CFW7 Filter wheel

Astro Physics 80/900mm guide scope

SBIG ST7E guide camera

Optec RGB filters, 50.8 mm unmounted

13 exposures of two minutes unfiltered for luminance: 26 minutes total

12 exposures of one minute for Red: 12 minutes total Red

13 exposures of one minute for Green: 13 minutes total Green

9 exposures of  one minute for  Blue; nine minutes total Blue

One hour total exposure

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