William Optics riser for 51 mm rings (SKU: M-BK51-BL)

William Optics riser for 51 mm rings (William Optics, SKU: M-BK51-BL) is a spacer block fitted beneath a compatible telescope ring. It increases the distance between the ring and dovetail plate, providing more clearance around the tube.

Key features

• raises the tube ring without changing the dovetail standard
• fit for selected small William Optics refractors

Included items

• riser block: BK51

Technical specifications

• model: BK51
• compatibility specified by the manufacturer: Cat-51, MiniCat, Z-61
• length: 65 mm
• width: 38 mm
• height: 20 mm
• weight: 84 g
• colour: black

The riser helps provide the required clearance between the tube and dovetail plate.