Celestial hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Great Nebula in Orion  ·  Horsehead nebula  ·  IC 2118  ·  IC 434  ·  M 42  ·  NGC 1976  ·  NGC 1990  ·  Part of the constellation Eridanus (Eri)  ·  Part of the constellation Lepus (Lep)  ·  Part of the constellation Monoceros (Mon)  ·  Part of the constellation Orion (Ori)  ·  The star Aldebaran (αTau)  ·  The star Alnilam (εOri)  ·  The star Alnitak (ζOri)  ·  The star Arneb (αLep)  ·  The star Bellatrix (γOri)  ·  The star Betelgeuse (αOri)  ·  The star Mintaka (δOri)  ·  The star Mirzam (βCMa)  ·  The star Rigel (βOri)  ·  The star Saiph (κOri)  ·  Witch Head nebula
Orion widefield Ha, Ed Magowan
Orion widefield Ha
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Orion widefield Ha

Orion widefield Ha, Ed Magowan
Orion widefield Ha
Powered byPixInsight

Orion widefield Ha

Equipment

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Description

'twas a cold night...but clear. Used a Canon EF 28-135mm at 28mm. The iris causes objectionable spikes on bright stars when stopped down...which it has to be to deliver any kind of reasonable astro image. I made a 55mm diameter aperture to put on the front of the lens so it could be stopped down without using the iris and getting the accompanying spikes, this was the first use.

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Orion widefield Ha, Ed Magowan