TeSeek S8171 2-Inch Astronomical Focuser Dual Speed Geared Focus Mount M90x1 for GSO RC8 and RC6 Telescopes

Specifications:
- Thread size: M90x1
- Focusing travel: 30mm
- Back focal length: 55mm

Features:
- Dual speed geared, 1:10
- 360 degree rotation support
- Flat field, M54*0.75 in front
- The output terminal is M48*0.75

Package Included:
- 1 x Focuser