About this product
Part Number: 10237
Sky-Watcher's largest premium quality imaging Newtonian with a wide field of illumination and fast f4 focal-ratio.
2" DUAL-SPEED LINEAR POWER FOCUSER: The new linear power focuser moves the drawtube using rollers rather than a rack and pinion for smooth precise focus adjustment. The dual-speed feature has a second focus knob with a 10:1 speed reduction for super-fine adjustments. The focuser is perfectly adequate but we think the telescope deserves something better, if you agree check out our range of Moonlite, Baader SteelTrack or Starlight Instruments focusers.
The paraboloidal primary mirror is made of low thermal expansion glass resulting in shorter cool-down times.
Regarding baffles: The QUATTRO-12S features a steel tube with matte-black interior, it does not contain baffles like the smaller Quattro models. Some believe baffles are good because they can prevent internal reflections and stiffen the tube, others disagree saying they push thermal currents into the light path (instead of allowing them to run up the tube and out the front). Both arguments are valid but neither is definitive. For this, their largest Quattro telescope, Sky-Watcher have chosen a smooth baffle-free interior.
An optically matched Aplanatic Coma Corrector is available for optimum performance.
Quattro 300 (12-inch) specification
- Diameter of Primary Mirror 300mm
- Telescope Focal Length 1200mm (f/4)
- 9x50 Finderscope
- Parabolic Primary Mirror
- 2" (50.8mm) Dual-Speed 10:1 Linear Power Focuser
- Tube Rings and Dovetail Bar
- 0.5mm Ultra-Thin Secondary Mirror Supports
- 44% more Light-Gathering than 250mm
Total weight: 23kg
Tube length: 1090mm
Tube diameter: 350mm
Fast Newtonians are best suited to experienced astronomers. They require precise collimation and a Coma Corrector to reach their full potential. If you are unsure whether one will suit your requirements please contact us before placing an order
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