Sky-Watcher QUATTRO-250P 250mm f/4 Dual-Speed Imaging Newton OTA

Sky-Watcher Quattro-10S f/4 250mm Dual-Speed Imaging Newtonian (steel tube) - 10239

The 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. 10" Quattro Tube interiors have knife-edge ray-traced baffles.


2" DUAL-SPEED LINEAR POWER FOCUSER (both models): 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: Features paraboloidal primary mirror made of low thermal expansion Pyrex glass resulting in substantially shorter cooling-down times.

(Please note the Quattro-250P was previously named Quattro-10S)

Standard Specification:

• Highest Practical Power (Potential) x508
• Diameter of Primary Mirror 254mm
• 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 and Dovetail Bar
• 0.5mm Ultra-Thin Secondary Mirror Supports
• 56% more Light-Gathering than 200mm