TOTAL: HK$ 0

Sky-Watcher StarGate DOB 20'' OTA Only

Sky-Watcher StarGate DOB 20'' OTA Only


ZZ-99082
In Stock

HK$ 28000


+ -

圖片僅作供參考,並不代表產品實物及所包括配件。
Pictures shown are for illustration purpose only and may not be an exact representation of the product and accessories included.
  • Description

 
  • -Brand new Sky-Watcher StarGate DOB 20'' Primary Mirror with Primary Mirror Mount (optical tube assembly, excluding the curved moon-shaped support and base).
  • -Includes the primary mirror and primary mirror mount, secondary mirror and secondary mirror mount, truss tubes, and focuser mount.

  • PARABOLIC PRIMARY MIRRORS 

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, contrasty images, which are full of detail.

SKY-WATCHER DELUXE MIRROR COATINGS

Most reflectors today usually have a coat of aluminum 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 specialized 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 a standard for Optimum Durability and Long Term Performance.