Quote:
Originally Posted by Andy01
Thanks Rick, Colin, Suavi & Mark. 
Seems that there’s a guy in the USA on Astrobin using the same setup as me here so I’m hoping to get some direction on spacers from him soon.
Meanwhile Marke, do you think using a Bhatinov mask will help with fine tuning the primary?
Any tips on the correct adjustments technique there? 
Cheers
Andy |
No I use the Jewel box cluster in Crux as a good test , just defocus till you have donuts rather than a large disk. Then loosen the lock screws on the primary take a pic then look for one side of donut thats is either brighter or are squashed like in your pic , then slightly turn the adjustment that corresponds to the opposite side. Take another pic recenter and repeat till you have nice even looking donuts then you are done. Just takes a bit of time but it will be spot on then .