click image to enlarge, click here for highest resolution
Ha= red, [OIII] = Green, [OIII] + 15% Ha = Blue (simulates Hbeta)
click image to enlarge, click here for highest resolution
Taken on August 10-11, 2005 from my backyard in Castro Valley, California
Pentax Takumar 150mm f/2.8 medium format camera lens
Finger Lakes CM10XME 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 3nm Ha filter (50mm unmounted)
Custom Scientific 3nm [OIII] filter (50mm unmounted)
seven exposures of 30 minutes for Halpha
eight exposures of 30 minutes for [OIII]
seven and a half hours total exposure time