Quick question - when would I use an SCT connector adaptor?

[jonathan]

I have a Williams Optics 2" star diagonal, with it came a short tube with screw threads at either end and a collar, apparently it is an SCT connector adaptor. Only problem is, I'm not entirely sure when I would use it. Between the star diagonal and the SCT scope is a Baader Steeltrack focuser, I assume the connector adaptor is for if I want to connect the star diagonal directly to the back of the scope, but how does that work?

[Merlin66]

Yes, on any SCT used without the added Crayford, the diagonal just screws onto the rear cell and you use the "normal" mirror focus knob.

(I have a Feathertouch 10:1 knob on my C9.25 and the spectroscopes held on the rear with the SCT thread - works well for me)

[jonathan]

Does the normal tube unscrew from the 2" diagonal though? I've never tried, just wondering.

[Merlin66]

Hmmm

I have a Meade "standard" SCT diagonal, with the locking ring for the SCT thread. Don't know what's on the WO version.