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Flat base with leveling screws for 3.5"" diameter Feather Touch focuser

Outside dimension is 6"" square

Base comes complete with all mounting hardware.

The base has a mounting hole pattern of 5.25"" to center

Focuser adapter part#A35-503-TMB is needed to thread focuser into base.

Inside of base has M138x1 threads to thread tube adapter ring.


Use with FTF3500 series focuser