Hi Guys - I've re-collimated my C11 since removing the secondary mirror for my Hyperstar. I don't know if it was like this prior to using the Hyperstar, as I used it 'new out the box' - but spotted this collimating.
Although there might be a few dust donuts etc this looks different to me, and subsequently I always feel like I'm not collimated perfectly. In some images I feel the stars are still flared or "pac-man" like - but that might be me being over critical now, as I'm not using a field flattener on the C11 SCT.
A very out of focus star seems okay, but as it approaches focus there seems to be something bottom left.
Is it normal - should I be worried? I can't spot any obstruction in my OTA.
Thanks