van den Bergh 142 Dark Nebula (VdB142) in Halpha light

click on image to enlarge. Click here for highest resolution

Halpha only

Taken on October 16, 2003 from my backyard in Castro Valley, Ca.

Astro-Physics Traveler f/6 with Astro-Physics 0.75X Telecompressor (F=457.5mm total, f/4.5)

SBIG ST10XME imaging camera @ -22C

Astro-Physics 80mm guidescope

SBIG ST7E guide camera

Astro-Physics AP1200GTO mount

Finger Lakes Instrumentation DF2 Digital Focuser

Finger Lakes Instrumentation CFW1 Filter Wheel

Custom Scientific Narrowband Emission Line Filter

   Hydrogen alpha        656.3nm  3nm FWHM

4 exposures of ten minutes each through Ha filter

40 minutes total exposure time

Maxim 3.20 used for image capture

Sigma pre-beta 11 used for darks, biases, flats, combines

Photoshop 7 used for final adjustments


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