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Contains:  28 eta Ori, 31 Ori, 34 del Ori, 36 ups Ori, 41 the01 Ori, 43 the02 Ori, 44 iot Ori, 45 Ori, 46 eps Ori, 48 sig Ori, 49 d Ori, 50 zet Ori, Alnilam, Alnitak, B33, De Mairan's nebula, Great Nebula in Orion, Hatysa, Horsehead nebula, IC 430, IC 434, IC423, IC426, IC430, IC431, IC432, IC434, IC435, M 42, M 43, M43, M78, Mintaka, NGC 1975, NGC 1976, NGC 1977, NGC 1980, NGC 1981, NGC 1982, NGC 1990, NGC 1999, NGC 2023, NGC 2024, NGC 2064, NGC1924, NGC1973, NGC1975, NGC1977, NGC1980, NGC1981, NGC1999, NGC2023, NGC2024, NGC2064, NGC2067, NGC2071, Orion, PK203-18.1, PK204-16.1, Part of the constellation Orion (Ori), Sh2-276, Sh2-277, Sh2-279, Sh2-281, Thabit, The star 31Ori, The star 42Ori, The star Alnilam (εOri), The star Alnitak (ζOri), The star Mintaka (δOri), The star ηOri, The star ιOri, The star σOri, The star υOri, VV Ori, VdB42, VdB44, VdB48, VdB54, VdB55, VdB59
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M42 & Horsehead H-alpha Test With Canon 100mm Lens, 


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

Technical card

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: 5h 38' 20"

DEC center: -3° 46' 1"

Pixel scale: 22.640 arcsec/pixel

Orientation: -109.292 degrees

Field radius: 5.731 degrees

Resolution: 1440x1115

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)

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