Celestial hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  32 And  ·  35 nu. And  ·  Andromeda Galaxy  ·  M 110  ·  M 31  ·  M 32  ·  NGC 205  ·  NGC 206  ·  NGC 221  ·  NGC 224  ·  The star 32And  ·  The star νAnd
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M31 with 300mm fullframe, tommy_nawratil
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M31 with 300mm fullframe

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M31 with 300mm fullframe, tommy_nawratil
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M31 with 300mm fullframe

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Description

a test shot with Canon 300L at f/4 and Eos6d astromod at Iso800. Tried to get the faint outer extensions not often seen. The lens puts a sort of moustache to the corner stars and blurs star halos a little bit, but has good light gathering power at f/4. This is a sample exchanged by Canon, as the first one was too asymmetric. This one I measured to have Strehl 61%, mostly dropped by astigmatism, not diffraction limited but straight enough to work.

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M31 with 300mm fullframe, tommy_nawratil