Sky-Watcher
Skywatcher Explorer 300 PDS OTA Parabolic Dual Speed Telescope #10222S (UK) BNIB
Skywatcher Explorer 300 PDS OTA Parabolic Dual Speed Telescope #10222S (UK) BNIB
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Skywatcher Explorer 300 PDS OTA Parabolic Dual Speed Telescope #10222 The new Sky-Watcher EXPLORER-300PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-300P but with two significant advantages. A Dual-Speed 10:1 ratio focuser is now included for excellent focusing precision. Also the tube length has been slightly shortened to optimise performance for prime-focus photography. Even better performance for astro-photography and visual use can be achieved when used in combination with Sky-Watcher’s Newtonian coma corrector (Prod.Code 20233) STANDARD SPECIFICATION: PARABOLIC PRIMARY MIRRORS SKY-WATCHER DELUXE MIRROR COATINGS FREE Fedex Priority 24 & 48 Delivery to Zone 1 Areas
Features High Quality Parabolic Primary Mirrors to eliminate spherical aberrations inherent in 'fast' focal length reflectors with spherical primary mirrors. The mirrors are parabolized to bring all the light rays to the same focal point to give sharp, constrasty images, which are full of detail.
Most reflectors today usually have a coat of aluminium as the mirror surface and then an overcoat of silicon monoxide or silicon dioxide to protect it. Silicon dioxide produces a much more durable coat than silicon monoxide but requires specialised equipment to apply it and is therefore more expensive. Protection is needed, because in most reflectors, the mirror is open to the elements and deterioration of the reflective layer reduces the resolution of the telescope. ALL Sky-Watcher reflectors are Multi-Coated with Silicon Dioxide as standard for Optimum Durability and Long Term Performance.
