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Off Axis Guider - extension adaptors.


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I have an off axis guider, I think it is an orion one, and if I remove the 1.25" nose piece from a DSI it screws onto this thread (I do not know the thread size of this). To use the off axis part with an eyepiece I need to have the dsi 30mm further out. Does anyone know where I can buy these adaptors?

And if I have a camera in the off axis part, I probably need the primary camera twice as far out?

Any help gratefully received. The off axis guider is on loan and is missing the adaptors, which I guess were there once.

Kind regards,

Mike MS

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Hi Mike,

They tend to be standard T2 extension adaptors similar to these:-


There are more expensive variable extenders also.

Unless you know for certain the OAG manufacturer, to ascertain the correct thread sizes, and

the correct spacings for your equipment I cannot be more specific.



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