Zygo Tested Refractors

This high-end Evostar-72ED Apo features a doublet objective lens, with one Extra-Low Dispersion (ED) glass element. Top quality Schott glass is utilised for the Crown element.

The new EVOSTAR DS-PRO Series ED Apochromatic refractors in their stunning Black-Diamond livery, house premium optics of the same quality and performance level as our now legendary Equinox series, making them superb instruments for both imaging and visual observations.

The Altair 72EDFX is a more refined version of the well-known and loved Lightwave 72 ED-R, circa 2013. Since then, this telescope has evolved into a state-of the art imaging or visual refractor, with improved optics in the form of an FPL53 based doublet objective lens providing superior colour correction.

The newborn Zenithstar 61II (2020 Model) is the most versatile and portable scope ever made by William Optics. It provides and excellent sharp image with any DSLR for astrophotography or wildlife photography.

Zenithstar 73 is a greatly versatile and portable refractor telescope for beginners and veterans alike. Designed for both astrophotography and wildlife photography, high power visual observing through the Zenithstar 73 is also hugely satisfying.

We are very exciting to announce All New 2019 Super ZenithStar 81 F6.9 imaging APO!!! This beautiful scope is everything you always wanted in a refractor, starting from extreme sharpness for clear details, and APO color correction.

We are very exciting to announce All New 2019 Super ZenithStar 81 F6.9 imaging APO!!! This beautiful scope is everything you always wanted in a refractor, starting from extreme sharpness for clear details, and APO color correction.

The brand new RVO Horizon® 80mm ED Doublet refractor has joined the RVO Horizon family! These superior quality refractors deliver breathtaking images thanks to it's FPL-53 glass which will deliver high contrast, sharp views each and every time!

The Takahashi FS-60CB apochromatic refractor features exceptional optical and mechanichal qualities (objective with Fluorite doublet) and an incredible compact design. All Takahashi is in it.

The new GT71 features a 3-element objective using high-quality FPL-53 extra-low dispersion glass that reduces any secondary spectrum to an unbelievable degree.

The brand new RVO Horizon® 80mm ED Doublet refractor has joined the RVO Horizon family! These superior quality refractors deliver breathtaking images thanks to it's FPL-53 glass which will deliver high contrast, sharp views each and every time!

Sky-Watcher Professional ESPRIT 3-Element ED apochromatic refractors offer optical performance rivaling similar telescopes from even the most famous high-end brands.

The new 2019 GT81 MKIV (Fourth Generation) three-element super APO Anniversary offer superb quality for imaging and visual use at an affordable price！From the pristine white finish on the CNC to the elegant gold trim which has more than just good looks.

Sky-Watcher Professional ESPRIT 3-Element ED apochromatic refractors are instruments of the highest quality with optical performance rivalling or exceeding similar telescopes of even the most famous high-end telescope brands.

New for 2021 - The FLT 91 is the perfect Apochromatic refractor for visual and photographic astronomers demanding excellence in a midsize telescope. The three-element optical design features a 91mm aperture using FPL-53 glass. 

We are proud to introduce the new Sky-Watcher Professional ESPRIT 3-Element ED apochromatic refractors. These are instruments of the highest quality with optical performance rivalling or exceeding similar telescopes of even the most famous high-end telescope brands.