M17 in RGB from AP180EDT F9 and FLI Proline 9000 with Baader RGB Filters

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taken June 14, 2008 from my backyard in Castro Valley, Ca.

AP180EDT F/9 with AP field flattener

AP1200GTO mount

AP80/900mm guide scope

FLI Proline 9000 camera (eng grade sensor), operated at -25C no RBI Annhilator used (slow download mode)

SBIG ST7ME guide camera

Baader Planetarium RGB 50 x 50 mm square filters


3 exposures of 10 minutes per filter

90 minutes total exposure

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