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Posted (edited)
5 minutes ago, alacant said:

Just thread a nut until it hits the head of the bolt; instant thumbscrew:)

I suppose once the focus is set on scope and guidecam it shouldn't always need adjusting? Is that your experience? I won't be taking it off. That is unless it doesn't work better than my guide scope!

Edited by Gerry Casa Christiana

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Posted (edited)
10 minutes ago, Gerry Casa Christiana said:

Is that your experience?

Yes. The longer m4 bolt is simply to set the position once and prevent it from moving whilst you tighten the other grub screws. Then remove it and thread back the original grub screw. Perhaps best to leave the screw to begin with as you're gonna find focusing with the 120mm by push-pull-tighten a frustrating task and you may not get it right first night. Unlike a wide guidescope, the OAG focus has to be perfect; the abberations are bad enough off axis as it is. Practise by focusing on a distant object in daylight to get you close using sharpcap.

10 minutes ago, Gerry Casa Christiana said:

unless it doesn't work better than my guide scope!

It always works better than a guidescope. Perfect 10 minute light frames every time....

Edited by alacant
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