William Optics 3.5 Rotator Rotolock Visual Back 

William Optics 3.5 Rotator Rotolock Visual Back: twist-lock comfort for your FLT

The William Optics 3.5-inch Rotolock visual back threads onto the 3.5-inch focuser of the large FluoroStar refractors and provides a generous 2-inch opening with a Rotolock clamping system on the eyepiece side. A quick twist of the locking ring and your eyepiece or star diagonal is clamped evenly all around: tilt-free, centered, and scratch-free.

The Rotolock principle works like a twist-lock: no loose screw-in clamps; changing is done with a hand motion, even with heavy 2-inch eyepieces and gloves on. William Optics supplies this visual back in multiple colors, matching the accent color of your tube.

For the large FLT refractors

Made for the 3.5-inch focusers and extension tubes of the William Optics FluoroStar line. This is how you use your complete 2-inch eyepiece and diagonal park on the largest WO tubes, without play in the chain.

Featured accessories

Combine the visual back with the Dura Bright 2-inch diagonal for comfortable visual observation on your FLT.

For whom yes and for whom no

• ✓ Owners of a FluoroStar with 3.5-inch focuser
• ✓ Visual observers who frequently and quickly switch eyepieces
• ✗ Owners of 2.5 or 3-inch focusers: choose the appropriate Rotolock or rotator adapter

Specifications

You can find more accessories for this brand at the William Optics brand page.