Hands-free focusing device, for accurate focusing, with the minimum of vibration.

Dual speed push-button operation (fast & slow). Can be used with the following telescopes:

Evostar models 90/102/120/150,

Startravel models 80/102/120/150,

Skyliner models 150/200/250,

Explorer models150/200/250

Will also work with most ED80 scopes, check for details.