Precise helical focuser screws onto a male T-thread and accepts 1.25-inch fitting eyepieces and accessories.
An excellent choice for fitting a guide cameras to an Off Axis Guider with a T-thread.
- 6mm focus travel.
- Optical depth ranges from 28mm to 34mm.
- Brass compression ring with three thumbscrews for a secure fit without marring.
- Very precise, one turn gives just 4mm of focus travel.
Note: Helical focusers rotate, this needs to be be considered when used with cameras.