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Home Telescopes Optical Tube Assemblies SkyWatcher Optical Tubes SkyWatcher Quattro 8S 205mm Imaging Newtonian OTA
The new 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. 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 drawtubeby 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.Radiant Aluminum Quartz (RAQ) Mirror CoatingPrimary mirror and secondary mirror with Radiant Aluminum Quartz (RAQ) coating providing up to 94% reflectivity with optimal durability and long term performance.
BBC Sky at Night magazine group test winner scoring 89%PYREX MIRRORS: Models feature paraboloidal primary mirrors made of low thermal expansion Pyrex glass resulting in substantially shorter cooling-down times.Specification:•Highest Practical Power (Potential) x410•Diameter of Primary Mirror 205mm•Telescope Focal Length 800mm (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•77% more Light-Gathering than 150mmPlease note - image shows the CF version
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