NGC7380 Emission Nebula in Halpha 

click image to enlarge, click here for highest resolution

to see this image in tricolor, click thumbnail image 

Taken on September 21, 2005 from my backyard in Castro Valley, California

Astro-Physics AP180EDT f/9 imaging scope used at f/9 (F=1620mm)

Finger Lakes CM2-1 imaging camera operated at -20C

(to see biases/darks and flats for camera gain/readout noise measurements, click here)

Robofocus

Finger Lakes CFW7 Filter wheel

Astro-Physics 80/900mm guidescope

SBIG ST7E guide camera

Custom Scientific 3nm Ha filter (50mm unmounted)

four exposures of 20 minutes for Halpha

one hour and 20 minutes total exposure time

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