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Hello Darren,
I was also out this evening with an Optex 8" f/4 Newtonian, Meade LPI, to get a start on astrophotography. First time out with this scope, first time with any scope for maybe thirty five years.
I didn't get anywhere near as good a set of images as you did. Well done.
I also suspect collimation issues with my OTA - some chromatic abberation, and like you the focuser is a bit rough, needs some serious tweaking. There are also some things I would like to do to the mount - adding an equatorial drive is among them, or perhaps upgrade to a real GoTo. I am given to understand from the articles I have read here that an f/4 scope requires very careful collimation to avoid chromatic aberrations.
Unfortunately the 8yo daughter lost interest quickly. Peeked at the moon, Jupiter, then moved on to play with her best mate from next door.
Oh well.
Regards,
Tony.
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