This is the Baader 2 inch clicklock adapter that replaces the stock Takahashi adapter. It fits Takahashi 2.7 inch focusers with M68 thread.
Twisting the collet clockwise tightens an internal clamp and prevents marking of your eyepiece or diagonal barrels. It is very secure and easy to operate.
It is a nicely made accessory that functions well but I decided I don't need it. It sells for $114 USD from Alpine Astro plus postage.
http://www.alpineastro.com/eyepiece_...Eyepiece Clamp
I will sell for $90 AUD including postage in Australia. Please send me a PM if you interested.
SOLD
Andy Jackson
Perth WA