A Zygo Interferometer test and report is available on this telescope. Select the Zygo test & report above and we will test the optical quality of your lens and provide a comprehensive 2 page report showing the PV, RMS, Strehl ratio and much more information about your telescope! This will increase value of your equipment and show you exactly the condition and quality of the lens. Click here to read more.
We are very exciting to announce All New 2019 Super ZenithStar 81 F6.9 imaging APO!!!
Innovative Bahtinov Mask Cover (Patented) included!
This beautiful scope is everything you always wanted in a refractor, starting from extreme sharpness for clear details, and APO color correction.
It has all the benefits of the ZenithStar family at a price that is truly unbelievable.
William Optics ZS81 Features
F/6.9 FPL53 Doublet air-spaced APO, in CNC machined ultra-high precision lens cell;
F5.5 with x0.8 Flattener.
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.
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.
• Mounting Rings
• New 2019 CNC Carry Handle Bar
• New DuelSide Dovetail plate (DSD 210)
• 2.5” R&P Focuser
• Innovative Bahtinov Mask Cover (Patented)
• Two-year, no fuss warranty and constant customer service!
Tube with Rings and Dovetail Weight：3.50kg