Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  HD85458  ·  M 81  ·  NGC 3031
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M81 - at f9, Simon
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M81 - at f9

Getting plate-solving status, please wait...
M81 - at f9, Simon
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M81 - at f9

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Description

I have recently bought a manual filter wheel but it has been hugely complicated to get it to fit the scope and camera with my existing accessories. I finally got it working but alas, for some reason or other, I just could not fine tune it all. So, I went back to my original filter drawer set up, but by that time my precise back focus that I did have, was lost, and so I am in the process of fine tuning that now! So, this explains the difficulties I am having at the moment with the Cassegrain and the stars in this image - hence my starless inclusion. I really think I should have operated on the principle of 'leave well alone'! This image was 160 two minute subs, equalling 5 hours and 20 minutes. Have a good night everyone...

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  • Final
    M81 - at f9, Simon
    Original
  • M81 - at f9, Simon
    B

B

Description: Starless version

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M81 - at f9, Simon