The Hunter Rising over the Charles River

Orion Widefield
All Images Copyright Steve Cannistra

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RA: 6h 37m 14s (J2000)
Dec: 0 degrees 17' 575" (J2000)
FOV: 85.5 deg x 63.3 deg

On December 10, 2020 at around 8:30PM I hiked about 1/2 mile along a dark trail bordering Cutler Pond in Needham, using a flashlight to lead the way, until I found a clearing that faced East along the Charles River.  It was around 30 degrees F but a nice, clear evening.  I set up my tripod and an old Canon 50D that I modded myself to remove the IR filter (full spectrum mod as described here), along with a clip-in Astronomik CLS-CCD filter and my Canon 10-22mm wideangle lens set to 12mm focal length.  After focusing using live view, I set up the camera to point east along the Charles River, hoping to catch Orion rising.  I proceeded to take 44 shots in sequence (using an intervalometer), each 20 seconds in duration (to avoid star trailing), and then packed up and hiked back home.  The total exposure time was only about 15 minutes, but I was able to capture some nice Ha emission, including Barnard's Loop, M42, a faint wiff of the Horsehead, the Rosette, and Orion's Head.  It's all there- just look for it :).  At first I was unhappy that I could only set the tripod behind the trees, but in retrospect, I like how it looks- the foreground branches give the photograph a nice perspective.

Photographic Details:
Dates:  December 10, 2020
Camera:  Modified Canon 50D with 10-22mm wideangle lens set to 12mm
Filter:  Astronomik clip-in CLS-CCD filter
Exposures:  Total exposure approximately 15 minutes, unguided (44 x 20 second subs)
Post-processing:  I used Canon Digital Photo Professional (DPP) for processing the raw files, and then used Sequator for aligning and stacking.  Further processing in Photoshop CS (16 bit format)

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