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Contains:  IC 4605, M 4, NGC 6121, NGC 6144, Part of the constellation Scorpius (Sco), The star 22Sco, The star Antares (αSco), The star τSco
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10 minute rho from orange zone, 


            Jonathan Young
10 minute rho from orange zone
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10 minute rho from orange zone

Technical card

Imaging camera:Canon 60Da

Filter:Hutech IDAS 2" LPS-P2

Dates:Aug. 3, 2019

Frames: 300x2"

Integration: 0.2 hours

Avg. Moon age: 2.75 days

Avg. Moon phase: 8.34%

Basic astrometry details job: 2841050

RA center: 16h 33' 5"

DEC center: -25° 40' 22"

Pixel scale: 19.308 arcsec/pixel

Orientation: 66.766 degrees

Field radius: 3.147 degrees

Resolution: 929x717

Locations: Backyard, Saline, Michigan, United States

Data source: Backyard


First light - Rokinon 135 cine @ t2.2
300 x 2s subs = 10 minutes
43x2s darks
canon 60Da, ISO 800 (RN ~3e-)
no tracking - tripod and manual rotation

Got the cine version for use around the house. From the MTF curves planning to shoot wide open on APS-C. I am quite pleased that the stars were symmetric, no noticeable coma or astigmatism across the entire field, just a little elongation from lack of tracking. A little bit of travel past infinity stop is encouraging for piecing an imaging train together when needed. This image is cropped to about 50% of the total area due to about 40 minutes field rotation. Binned 3x3 after stacking to reduce noise. Quick process in Startools. Replaced a few of the brighter stars with diffraction spikes. Only 10 minutes of integration from orange zone!

I will add flats shortly. Should greatly improve the rotating haze in the background.



Jonathan Young
License: None (All rights reserved)

Sky plot

Sky plot


10 minute rho from orange zone, 


            Jonathan Young