Celestial hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  Andromeda Galaxy  ·  M 110  ·  M 31  ·  M 32  ·  NGC 205  ·  NGC 221  ·  NGC 224  ·  The star 32And  ·  The star νAnd
M31 with unmodded DSLR and old achromat lens, Giorgio
M31 with unmodded DSLR and old achromat lens
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M31 with unmodded DSLR and old achromat lens

M31 with unmodded DSLR and old achromat lens, Giorgio
M31 with unmodded DSLR and old achromat lens
Powered byPixInsight

M31 with unmodded DSLR and old achromat lens

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Description

Another shot at M31 from my Backyard at the outskirts of Luxembourg (Bortle 5 area)

Crop from a wider image taken with an unmodded Canon 550D and a legacy M42 lens – the Pentax Takumar SMC 200mm F4

To get decent results from this achromat (which can be still found on ebay for less that 100€) I stopped the aperture at 37mm and very slightly defocused to reduce the ugly magenta halos due to chromatic aberration. I also carefully set the exposure time to avoid saturation of the brightest stars. And I further reduced star halos in post processing.

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M31 with unmodded DSLR and old achromat lens, Giorgio