A 1.5-inch (37mm) extension tube for the Explore Scientific 2.5-inch Hexagonal Rack and Pinion Focuser — adds back-focus distance when your imaging train or visual accessories need more space to reach focus.

The extension slides between the focuser drawtube and your accessories, providing the extra distance needed for cameras, binoviewers, or other equipment that requires additional back focus. Machined to match the 2.5" hex focuser's profile for a secure, wobble-free fit.

Key Features

• Adds 1.5" (37mm) of extension to the 2.5" Hex Focuser
• Machined to match hex focuser profile
• Secure, wobble-free connection

Ideal For

• Imagers who need more back focus — positions cameras and accessories at the correct focal plane
• Binoviewer users — provides the extra distance binoviewers typically require