Jump to content

M1 gremlins


paul
 Share

Recommended Posts

Out of two hours manage 90 minutes due to clouds (3min subs @ISO800) with my 550d on M1 but I seem to have my optics out of skew  the stars have an aura and coma. ? 

M1_90mins_quick_proc.thumb.png.414570f43965c60e091e9b0b6a372bd1.png

 Certainly not worth spending more time on processing. I suspect the newt is off square or the clip-in filter has an issue. Its a scope I fiddled with a lot over the summer so its probably something I've done. Time to tear it down and build it up from scratch double checking its all square- as I know it has done much better. (My modded Orion Optics 250mm with Skywatcher 2-element coma corrector.)

 

  • Like 3
Link to comment
Share on other sites

The abberation appears to be all going the same way Paul, (The refraction spikes are suppressed at 2-o-clock)  may be as simple as just a serious re-collimate. Try rotating the camera 180 degrees and see if the problems remain on the same plane before you go too mad tearing the scope down. 

Link to comment
Share on other sites

I checked the scope out, it definitely was out of collimation - laser spot was on the ring. I skipped my normal checks in my haste (clear skies calling !!) - lesson learned!

 

I'm surprised at the magnitude of error though.

 

@KevSThat was a good call on the spike offset - I shall use that test.

 

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...