Distance from mount to sensor

[Eric Garen]

I want to connect my Alpha ar7iv to a telescope and in order to design the correct adapter I need to know the distance from the surface of the lens mount to the CCD sensor.  Can anyone provide that information?  Would really appreciate it!

[Pieter]

18 mm

https://en.m.wikipedia.org/wiki/Flange_focal_distance

[Eric Garen]

Thank you, Pieter.  That's very helpful.  I had googled it with no results, but hadn't checked wikipedia.  I really appreciate your response.

 

[XKAES]

Does your telescope not use a standard mount?

[tadwil]

Yes, I have been wondering about that too.  I have all but given up about using my telescope so I had not paid much attention to OP's inquiry but since standard mounts come in 2 sizes (1 1/4 or 2 inch), OP only needs to buy a T2-NEX adapter with either 1 1/4 or 2 inch tube to drop into the eyepiece mount.  They are readily available from Amazon for under $20CAD.

 

[XKAES]

Or used on EBAY for even less.  I found mine at a GOODWILL store.