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Technical card

Imaging telescope or lens: Canon 70-200mm f/4 L

Imaging camera: Canon 550D (T2i)

Mount: Kenko Skymemo-R

Software: Adobe Photoshop CC, Adobe Photoshop CC

Resolution: 2917x4376

Dates: April 6, 2016

Frames: 59x120"

Integration: 2.0 hours

Avg. Moon age: 27.82 days

Avg. Moon phase: 3.28% job: 1673636

RA center: 314.553 degrees

DEC center: 44.485 degrees

Pixel scale: 4.508 arcsec/pixel

Orientation: 178.429 degrees

Field radius: 3.292 degrees


59x120 second exposures at f/4 iso 1600. canon 500d canon 70-200 f/4 L usm at 200mm. astrotrac.
I used a completely different processing approach on this. I converted the data nonlinear in adobe camera raw, applied the profile correction for the lens. I balanced the colors then stacked the entire set. very little stretching is done afterwards.



Judson Graham



With autoguided Celestron CGEM. older 2 versions were from over a year ago on a much less precises mount

Sky plot

Sky plot


North America Nebula April 6, 2016, Judson Graham