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Betelgeuse


Alec
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Alec

After you gain focus do you tighten the lock on the focuser.

I ask because your image train is slightly out of alignment.

If you look at Belt, the core is out of central alignment to the outer corona.

All your stars near the edges are elongated in the same direction as this off set.  

I would hazard a guess that you have some slop in the focuser, tightening the lock after you have focused should eliminate this problem.

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2 hours ago, Graham said:

Alec

After you gain focus do you tighten the lock on the focuser.

I ask because your image train is slightly out of alignment.

If you look at Belt, the core is out of central alignment to the outer corona.

All your stars near the edges are elongated in the same direction as this off set.  

I would hazard a guess that you have some slop in the focuser, tightening the lock after you have focused should eliminate this problem.

Graham 

thx for the advise. Since reading this I've adjusted the tension on the focus will take another picture same settings, and your correct too light on the locking screw thx :)

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