William Optics Apochromatic refractor AP 81/559 ZenithStar 81 Red OTA


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SKU: 62022 Category:


Product can be shipped as of 01.03.2021Order now!

The ZS81 is an F/6.9 FPL53 Doublet air-spaced APO with a CNC machined ultra-high precision lens cell, F/5.5 with a optional x0.8-Flattener. It comes wit a 2.5”R&P Ultra robust focuser with 1:10 dual speed: a treat to use during astrophotography. No image shifting! Heavy duty: perfect for your accessories.

It comes with a innovative Bahtinov Mask Cover!

Despite its 81mm objective, the scope is still very compact and solid. Many airlines will accept it as carry-on luggage! Perfect size for serious observations of deep sky objects and planets. Solar observations possible with proper additional equipment.

This beautiful scope is everything you always wanted in a refractor, starting from extreme sharpness for clear details, and APO color correction.

It is not only important which telescope you buy, but also where you buy it.

We provide extra help:

  • We are a leading telescope dealer and know these instruments like the back of our hands.
  • We are always very happy to offer our assistance after your purchase, should you encounter any problems with your telescope’s setup or operation.
  • Our ‘Telescope Basics’ booklet – an 80-page beginner’s guide for our telescopes – is provided free of charge with every telescope we sell.
F/6.9 FPL53 Doublet air-spaced APO
Bahtinov Mask

Product number: 62022


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