The Component Parts.

The war-surplus eyepiece (M17 elbow telescope) removed from its focusing mount,
the threaded ring (originally an attachment for a rubber eyeguard),
a piece of sink-drain tubing threaded to mount the eyepiece in a 1.25" telescope focuser,
and a piece of 1" steel pipe threaded on one end to fit the threaded ring (which is used as a coupler).

The Subassemblies

The eyepiece as I've used it for years, and
the camera holder.

The Assembled Adapter

The Adapter in Use

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