Sky-Watcher Quattro-250P Parabolic Dual-Speed Imaging Newtonian OTA

Sky-Watcher Quattro-250P Parabolic Dual-Speed Imaging Newtonian Optical Tube Assembly. The new Sky-Watcher Quattro series with their fast f/4 focal ratios, have been specially designed for high quality astrophotography with short exposure times. They are of course also fine telescopes for visual observations. Their tube interiors have knife-edge ray traced baffles to ensure no light is lost, and stray light is kept out! Its paraboloidal primary mirror is made of low thermal expansion, fast-cooling Pyrex glass.

Sky-Watcher Quattro-250P Features

2" Dual-Speed Linear Power Focuser: The new linear power focuser utilises 4 precision ball bearings to support the drawtube and provide great stability and zero image shift while supporting a heavy eyepiece or camera. Moving the drawtube by the roller rather than a rack and pinion ensures exceptionally smooth operation, great feel and precise adjustability. The dual-speed feature has a second focus knob that has a 10:1 speed reduction to provide the super-fine adjustments even the most demanding users can appreciate.

Pyrex Mirrors: Both models feature paraboloidal primary mirrors made of low thermal expansion Pyrex glass resulting in substantially shorter cooling-down times.

• Highest Practical Power (Potential) x508
• Diameter of Primary Mirror 250mm
• Telescope Focal Length 1000mm (f/4)
• Note: Eyepieces NOT supplied
• 9x50 Finderscope
• Parabolic Primary Mirror (Pyrex)
• 2" (50.8mm) Dual-Speed 10:1 Linear Power Focuser
• Tube Rings & Dovetail Bar
• 0.5mm Ultra-Thin Secondary Mirror Supports
• 56% more Light-Gathering than 150mm