[Hans Tucker (Hans)]

The massive 4" focuser on a APOMAX 130 f12 is aesthetic but it is not overly functional, so I am looking at changing it with a newly acquired FTF3035 3" focuser.

The challenge is how to adapt the FTF3035 to the APOMAX.

Do I do what a previous APOMAX owner did and replace the entire focuser or do I retain the original focuser tube flange and try and adapt to that. The adapter on the FTF3035 that has the three brass screws was for a different refractor so that will be changed out with the new adapter.

First attached image is the original 4" Focuser.
Second attached image is the FTF3035 Focuser I want to fit
Third attached image is another APOMAX that the owner replaced the focuser with a 3.5" FTF3545.

Starlight Instruments has a backlog so I will try and seek out a local company to manufacture the adapter .. might also be cheaper.