Sharpless 2-240 in Halpha from Pentax medium format 300mm f/4 lens with FLI IMG6303E and Custom Scientific Halpha filter

click to enlarge, click here for highest resolution

Taken on November 30 and December 1,  2007 from my ranch near Mariposa, Ca.

no moon in sky when data taken, compare to image taken under full moon

(Full moon conditions)

Pentax Takumar 300mm f/4 medium format camera lens  (used at f/4)

Finger Lakes IMG6303E imaging camera operated at -26C

Finger Lakes DF2 Digital Focuser

Finger Lakes CFW7 Filter wheel

Takahashi FCT-76 guide scope

SBIG ST7E guide camera

Custom made camera mounting frame

Custom Scientific 4.5nm Ha filter, 50 mm unmounted

Optec RGB filters, 50 mm unmounted

17 exposures of 20 minutes for Halpha

5 hours 40 minutes total exposure time

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