Does anyone know the thread that connects the focuser to the scope on an Equinox ED80

[old_eyes]

The focuser on my Equinox ED80 seems to have failed. To be specific the fine focus knob just rotates without doing anything. Coarse focus seems OK.

I can get a replacement Moonlite that is certified to fit (https://www.firstlightoptics.com/moonlite-focusers/moonlite-cf-crayford-focuser-for-refractors.html), but it is quite a price. I wondered if anyone knows the thread size for the focuser to scope tube connection so that I could search other manufacturers. It's a nice scope and although I am looking at an upgrade, I would prefer that it did not become a doorstop. I could continue to use it if I replaced the Sesto Senso focuser I am using at the moment with a Lakeside or similar, but would still be worrying that something was terminally wrong.

[Robindonne]

Moonlight for example, or starlight(feathertouch) have some tools and lists on their website to select the right adapter for their focusers.  Im sure they describe these adapters, including the threadsize.  

[Robindonne]

This list

 

Edited March 10, 2021 by Robindonne

[old_eyes]

5 hours ago, Robindonne said:

This list

 

Thank you. Exactly what I was looking for. Not sure I have ever seen a M109x1.5 thread in a spec, but at least I know what I am looking for.

[Robindonne]

2 hours ago, old_eyes said:

Thank you. Exactly what I was looking for. Not sure I have ever seen a M109x1.5 thread in a spec, but at least I know what I am looking for.

No no.  M84x1!!!

[old_eyes]

4 hours ago, Robindonne said:

No no.  M84x1!!!

Well spotted. Clearly, I can't read a simple table!

[Kev M]

Is it just a tension screw loose or tight , can it be repaired ?

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Edited March 14, 2021 by Kev M

[teoria_del_big_bang]

Sounds easily repairable to me as well, I have had this before and repaired it myself by partially taking it apart and tightening something.

Steve

[Merlin66]

Hmmm, a little surprised by the reference to threaded connections with the ED80.

I have three Skywatcher ED80 scopes and each has a 96mm internal fitment to the OTA and three M4 screws holding the focuser.

 

[old_eyes]

On 14/03/2021 at 22:52, Merlin66 said:

Hmmm, a little surprised by the reference to threaded connections with the ED80.

I have three Skywatcher ED80 scopes and each has a 96mm internal fitment to the OTA and three M4 screws holding the focuser.

 

It's the Equinox ED80. Definitely a threaded connection.

[old_eyes]

On 14/03/2021 at 11:01, Kev M said:

Is it just a tension screw loose or tight , can it be repaired ?

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It's slightly more complicated. That's what I thought was the problem originally, but I could not find a position where my Sesto Senso focuser would work. Then I discovered that the fine focus shaft (which the Sesto Senso connects to) was slipping like mad. The coarse focus still seems to work OK, but not the fine focus. The planetary gear is not working properly. I think it might be fixable by stripping it down and making small adjustments to the nuts holding the whole thing together. But then again, maybe not. Hence the question.

[Merlin66]

Ahhhh, Sorry I missed that.....