High quality adaptor for the 3.5" focusers of the large FLT refractors from William Optics. The adaptor works like a visual back and uses the principle of the well-known "Twist-Lock" or "ClickLock" systems. Eyepieces and accessories are clamped firmly yet gently by turning - tilting is therefore impossible. The Rotolock is screwed directly onto the 3.5" extension tube of the FluoroStar refractor using a thread. A 2" opening is then available on the eyepiece side.
The Rotolock adaptors are available in red, blue and gold.
