William Optics presents the new 3.5" RotoLock "visual back". No more compression rings needed! The ultra smooth design is perfect for center locking. This adapter will fit on the previous FLT 3.5" focuser. Compatabilte with the William Optics Gran Turismo 81 w/ Internal Focus Design APO and the William Optics Gran Turismo 81 APO w/ Internal Focus Design, Field Flattener & UniGuide

• Compatabilte with the William Optics Gran Turismo 81 w/ Internal Focus Design APO and the William Optics Gran Turismo 81 APO w/ Internal Focus Design, Field Flattener & UniGuide
• No more compression rings needed
• Fits on the previous FLT 3.5" focuser

• William Optic 3.5-2 Rotolock Visual Back Adapter - Red