Which Screws?

[Duns]

Just a quick question which I'm sure someone can help me with.

There are 3 thick knurled short knobs and 3 thinner longer knurled knobs at the primary mirror end of the Celestron 130 SLT - the question is which ones are used to adjust the primary mirror. Its not far out but it does need collimating.

Many thanks in anticipation

[Duns]

OOps - just read a previous post re a 200 dob and if there is a standard for these things it looks like the thick knobs collimate and the thin ones lock - am I right?

[austen4]

Yes this is correct. I thought the opposite but I was wrong.

Hope this helps