DWB 111 Propeller Nebula Widefield from Pentax 6x7 400mm f/4 and IMG6303E with Custom Scientific 4.5nm Halpha filter

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taken on July 3 and 4, 2009 from my ranch in Mariposa County, in the California Sierra Gold Country

Pentax 6x7 400mm f/4 lens operated at f/5.6

FLI IMG6303E Camera operated at -26C

FLI CFW 7

Custom Scientific 4.5nm Halpha (50mm round)

FLI PDF Focuser

Takahashi FCT 76 Guide Scope

SBIG ST7E Guide Camera

Astro-Physics AP1200GTO mount

26 exposures of 10 minutes

4 hours 20 minutes total exposure

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