M17 Widefield in Halpha from AP155EDF and FLI Proline PL39KM with FLI Research Grade Halpha Filter

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for full resolution (7024 x 5168, ~34.6Mpixels) click here

taken on April 16 and 17, 2010 from my ranch in Mariposa County, California 

AP155EDF f/7 imaging scope used with AP 4" Field flattener

Finger Lakes CFW 4-5 filter wheel 

Finger Lakes Research Grade Halpha filter (50 x 50 mm) 

Finger Lakes Proline 39M monochrome camera

Robofocus

AP 80/900 mm guide scope

SBIG ST7ME guide camera

AP1200GTO mount

14 x 15 minutes no filter

3.5 hours total exposure time

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