[peter_4059 (Peter)]

Originally Posted by RickS

Nice result for a quickie, Peter. The stars aren't quite as round as most of your recent images?

Thanks for the comments Rick. The stars are a constant battle when I move the SN10. It is a lot easier to get the collimation right when the OTA is sitting horizontal on a table with the focuser pointing up however I then need to lift it onto the mount with the focuser pointing down and manoeuvre it through the obs door. That is simpler at Astrofest where there is no obs to get in the way.

The secondary is normally the issue as the whole secondary assembly can rotate in the corrector plate. Bondy and I had a go at removing the secondary to replace the gaskets before Astrofest however it looks like the retaining ring has been lock-tighted in position. We did discuss machining a new one however that is not going to be a quick job.

Originally Posted by Slawomir

Awesome colours and a good result for such short integration

Thanks Sauvi. My tree lined city horizons put a significant limit on integration times. Luckily the large aperture compensates somewhat.