IC434/Horsehead and Flame Nebula in RGB + Ha from Pentax 6x7 400mm f/4 and FLI ML8300

click to enlarge click here for highest resolution

taken on December 23, 2009 from my ranch in the California Gold Country under a first quarter moon

Pentax 6x7 400mm f/4 ED(IF) camera lens used at f/4 

Finger Lakes CFW 7 filter wheel 

Finger Lakes PDF

Finger Lakes Microline ML8300 camera operated at -25C with RBI annihilator enabled

Optec 50mm IR Blocking RGB filters (ca ~2002)

Custom Scientific 4.5nm emission line filters

Takahashi FCT 76 guide scope with Takahashi rings

SBIG ST7ME guide camera

AP1200GTO mount

18 x 5 minutes Red, Green

24 x 5 minutes Blue

12 x 10 minutes Halpha

7 hours total exposure (taken in one session)

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