The knobs below will fit all versions of the Takahashi 225 mm aperture f/12 Schmidt-Cassegrain secondary.
A. Knobs for TSC-225 Secondary
Fits: Takahashi TSC-225 Schmidt-Cassegrain versions
Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Black anodized aluminum alloy
- The factory dust cover will fit normally with the knobs in place.
- The cover over the factory collimation screws must be removed and set aside when Bob's Knobs are installed. The cover is cosmetic only and will not affect operation of the scope.