Sky-Watcher 2 tuuman Dual-Speed Crayford okulaarivedin refraktoreille 10:1 hienotarkennuksella

Sky-Watcher's 2-inch dual-speed Crayford focuser brings precise, backlash-free focusing to refractor telescopes. Unlike single-speed focusers, the 10:1 microfocus knob allows fine adjustments for critical sharpness, essential for high-magnification visual observation and astrophotography. The CNC-machined aluminum body and anodized black finish ensure durability and smooth operation.

Highlights

• Dual-speed Crayford design with 10:1 fine focus reduction
• 2-inch drawtube with 80 mm travel and 1.25-inch adapter
• Roller bearing system for zero image shift
• Focus lock and tension adjustment for secure positioning

In daily use

The coarse knob quickly brings objects into approximate focus, while the fine knob enables minute adjustments without flexure. The flat base with mounting holes fits most refractor tubes, and the focuser's low-profile design (95 mm minimum height) preserves back-focus for imaging accessories. The included 1.25-inch adapter accepts standard eyepieces, and the 2-inch holder accommodates wide-field oculars.

Full specifications

• Focuser type: Crayford
• Speed: Dual-speed (coarse and fine)
• Microfocus gear ratio: 10:1
• Drawtube diameter: 2 inches (50.8 mm)
• Drawtube travel: 80 mm
• Eyepiece holder diameter: 2 inches
• Included adapter: 1.25-inch eyepiece adapter
• Mounting interface: Flat base with mounting holes
• Material: CNC machined aluminum
• Finish: Anodized black
• Bearing system: Roller bearings
• Focus lock: Yes
• Tension adjustment: Yes
• Minimum optical path length: 95 mm
• Maximum optical path length: 175 mm
• Recommended use: Visual observation, astrophotography

Final note

Designed for refractor telescopes, this focuser upgrades your instrument with smooth, precise control for both visual and imaging applications.