M45 Pleiades in Blue light from 6x7 Pentax 400mm f/4 ED(IF) lens and ML8300

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taken on Jan 1, 2010 under a full moon from my ranch in the California Sierra Gold Country

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 Blue filter (ca ~2002)

Takahashi FCT 76 guide scope with Takahashi rings

SBIG ST7ME guide camera

AP1200GTO mount

20 x 5 minutes Blue

1 hour 40 minutes total exposure 

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