5 replies to this topic

[Tesla220]

Good day

 

  I am missing a component that came with my JMI NGF-S external focuser. This is a crayford design focuser. I am using it on my Celestron C-11. I need to adapt the 2" eyepiece receptacle on the focuser to a true SCT thread. I tried buying one off of Ebay however the threads are so short I can not attach any SCT components to it. I would like to attach a 6.3 reducer corrector then a 93633-A to that then of course my DSLR camera. No matter what system I image with I am going to need a proper way to attach SCT accessories to my focuser. Any ideas would be appreciated.

 

Thanks. Ken

 

My focuser. The adapter I need is the item in the top left of the picture.

 

This is like the item I need however the thread depth is too short as indicated between the red arrows.

 

 

Attached Thumbnails

• 

Edited by Tesla220, 30 August 2023 - 10:31 PM.

[wrvond]

I'm not exactly sure what you are trying to accomplish so I'll lay out what I think your options are.

First, if you are trying to adapt the f/6.3 R/F directly to the focuser drawtube, the eyepiece clamp may be removable, in which case you need to determine the thread size on your drawtube. To illustrate, here is my Baader SteelTrack:

 

 

Notice the little (2mm) grub screws - if I remove those I can take the eyepiece clamp off and install an adapter that is threaded to accept SCT thread (or T-2) attachments. Yours may be similar.

 

Or:

 

If you are trying to attach a nosepiece to the R/F and insert that into the eyepiece clamp, then attach your diagonal or camera to the male side of the R/F, a Baader 2" nosepiece has an SCT thread on it and attaches directly to the R/F:

 

 

 

Hope this is what you are looking for!

Edited by wrvond, 30 August 2023 - 09:13 PM.

[Tesla220]

Found someone who sells them new, thanks to all who gave this some thought!

 

  Ken

[Dan478]

Found someone who sells them new, thanks to all who gave this some thought!

 

  Ken

Hi Ken,

 

Could you give me a link to that adapter vendor?

 

Thank you!

[Tesla220]

Hi Ken,

 

Could you give me a link to that adapter vendor?

 

Thank you!

https://optecinc.us/...ea9ecf698&_ss=r

[Dan478]

https://optecinc.us/...ea9ecf698&_ss=r

Thank you!