M42 - The Orion Nebula at 1612mm focal length (Chad Leader)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 41 Ori A) · 41 Ori C · 41 Ori D · 43 Ori) · 44 Ori) · Great Orion Nebula · Lower Sword · M 42 · M 43 · Mairan's Nebula · NGC 1976 · NGC 1980 · NGC 1982 · Orion Nebula · The star Hatysa (ι Ori · The star Mizan Batil II (θ2 Ori · The star Trapezium (θ1 Ori A · The star θ1 Ori C · The star θ1 Ori D

M42 - The Orion Nebula at 1612mm focal length, Chad Leader

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M42 - The Orion Nebula at 1612mm focal length

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M42 - The Orion Nebula at 1612mm focal length

I've been thinking about getting rid of my RC8 because it's generally problematic. After nabbing this photo, I think I'll keep it and upgrade the focuser. It really is capable of taking nice photographs. I've opted to not use a flattener. When well-collimated, I get decent stars to the corners with my 2600MM (APS-C). The biggest issue I've found is focuser sag. Star shape/collimation changes slightly with altitude. At zenith, stars are perfectly round, and the field is quite flat. This photo shows some slightly-misshapen stars, presumably caused by sag. We'll see if a solid focuser solves the problem...

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M42 - The Orion Nebula at 1612mm focal length

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M42 - The Orion Nebula at 1612mm focal length

M42 - The Orion Nebula at 1612mm focal length

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