Hi all, sorry for
another RC collimation thread...
I've got an RC8 that I've had for a couple of months and I'm not having much success collimating it.
I got it second hand and, as it had undergone a Perth to Sydney road trip to get to me, it's in need of a good collimation.
First I got it looking good just adjusting the secondary with a cheshire. Then I star tested it and got the secondary collimation spot on. But there was still a collimation error so I figured the primary needed some attention.
Then I followed this:
http://deepspaceplace.com/gso8rccollimate.php
At first I though I was getting closer to collimation but, long story short, I wasn't.
Anyway I've just got a Tak collimation scope and was hoping things would go a bit smoother now but it looks like the secondary mirror isn't centre spotted (see image). Am I missing something?
So I'm sure both the primary and secondary mirrors are significantly off collimation but I have no idea how I can collimate the primary when I'm not sure if of the state of the secondary...?
Any help/advice would be very gratefully received!
(the other pic is looking through the Tak collimation scope after getting as close as I could with a cheshire, the orange centre is because I'm shining a torch at the light hole thing and it's a different colour than the white monitor the scope is pointed at)