William Optics focusers are typically smooth and ready to use without any adjustment. For larger telescopes, tightening the Quick Tension Adjustment Knob can help prevent tube slippage. Other than this, we recommend not touching any screws on the focuser. If adjustment is necessary, please consult a qualified technician.
There’s two side to build WIFD focuser tension:
BOTTOM / Rack & Pinion Gear
- Quick tension adjustment knob
- Smoothness adjustment - Pull in (3mm Hex)
- Smoothness adjustment - Push out (2mm Hex)
- Please Don’t Touch
- Top cover screw Can be removed to attach the electronic devices such as EAF (refer to Installing EAF) or be used as a spare.
Telescope models from June 2025 no longer include the top cover screw.
TOP / Focuser Draw Tube
- Guider/Finder bracket mounting screws (2.5mm Hex)
- Focuser Draw Tube Tension Screws Please Don’t Touch
- Focuser Hardware Stop Screw (varies from models) Please Don't Touch
Notice
- When operating the telescope with a motorized focuser, do not overtighten the focuser tension. Excessive tension may damage the focuser mechanism.
- Make small and slow adjustments. Do not turn anything too much at once.