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Contains:  NGC 2064, NGC 2024, NGC 2023, Horsehead nebula, IC 434, IC 430, NGC 1999, NGC 1990, M 43, NGC 1982, NGC 1977, NGC 1980, M 42, Great Nebula in Orion, NGC 1976, NGC 1975, NGC 1981, The star 31Ori, The star υOri, The star 42Ori, The star σOri, The star ηOri, The star ιOri, The star Mintaka (δOri), The star Alnitak (ζOri), The star Alnilam (εOri), Part of the constellation Orion (Ori)
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M42 & Horsehead H-alpha Test With Canon 100mm Lens, 


M42 & Horsehead H-alpha Test With Canon 100mm Lens

M42 & Horsehead H-alpha Test With Canon 100mm Lens

Technical card

Resolution: 1440x1115

Dates:Jan. 30, 2018

Frames:Astrodon Ha 1.25" 5nm: 150x60" (gain: 200.00) -25C bin 1x1

Integration: 2.5 hours

Avg. Moon age: 13.54 days

Avg. Moon phase: 98.31% job: 1912174

RA center: 84.586 degrees

DEC center: -3.767 degrees

Pixel scale: 22.656 arcsec/pixel

Orientation: 109.287 degrees

Field radius: 5.731 degrees

Data source: Backyard


With the full Moon up and impacted all my program targets I decided to pull out the ZWO EOS adapter I'd bought ages ago and try it with my Canon 100mm f/2.8 Macro lens. I used a mask with a 29.4mm opening on the end of the lens to approximate f/3.3. I tried with it wide open at f/2.8 and had really unattractive flaring stars. The mask seemed to control that mostly.

Not quite enough signal to avoid having to noise reduce to the point of impacting the image quality but I was pleased with the FOV and potential for some really wide shots.



License: None (All rights reserved)

Sky plot

Sky plot


M42 & Horsehead H-alpha Test With Canon 100mm Lens,