BA35FL—Base 3.5" flat with leveling screws
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.