Telescope-Refracting Telescopes-Explore Scientific 127 mm Essential Air-Spaced ED Triplet Refractor

Explore Scientific 127mm Essential Series Refractor OTA

When the designers at Explore Scientific set their sights on creating a top-quality apochromatic refractor that anyone would be proud to own, they decided on a traditional air-spaced triplet optical design in a rugged, adjustable lens cell. All materials had to be top-notch, so genuine Hoya extra-low dispersion (ED) Dense Fluor Crown (FCD1) glass was chosen, and then experienced craftsmen shaped and polished the elements that would form the foundation of a high-quality, true APO refractor.

All Explore Scientific Air-Spaced Triplet APO Refractors are diffraction-limited at .25PV or better. Special EMD™ enhanced multi-layer coatings are deposited on all optical surfaces, and the result is bright, high contrast images with virtually no light scatter. Interferometric data on your newly purchased and registered Explore apochromatic refractor is available upon request after 6 months of ownership. Time restrictions apply; please contact Customer Service for more information.

While optics are definitely the most important component of any telescope, other features, like the focuser and the optical tube, play a crucial role in the design. Below you will find highlights on all of the ingredients used to create Explore Scientific Triplet APO refractors, including a very liberal warranty that speaks volumes about the confidence we have in our telescopes.

Learn more about the Explore Scientific ED127 and its impressive features in the video below!

Explore ED127 5″ Air-Spaced Triplet Refractor Highlights

• The Explore ED127 telescope has a focal length of 952mm and an f/ratio of 7.5. It comes with a white aluminum tube with black accents.

• Explore Scientific Air-Spaced Apochromatic Triplets have true APO optics and are diffraction limited at .25PV or better.

• Genuine ED glass from Hoya Japan is used on all ED APO Triplets at Explore, for superb quality and light throughput.

• Enhanced Multi-Layer Coatings (EMD) are deposited on optical elements to boost contrast and eliminate light scatter; and contrast is further enhanced with the installation of matte black knife-edge baffles in the optical tube assembly.

• While refractors seldom require additional collimation after initial factory adjustment, the lens cell design allows for consumer collimation. Sending your ED127 Triplet off to the factory is always an option, but is not required.

• 127mm models come with a heavy-duty 2″ dual-speed rotatable rack and pinion focuser, cradle rings with handle and Vixen dovetail, extension rings, a 99% reflective 2″ diagonal, and hybrid finder scope base (finderscope is sold separately).

• To attach your Explore Scientific Air-Spaced Triplet telescope to a variety of mounts, Explore has included the “Vixen-style” dovetail at the base of the dual rings. The “Vixen-style” plate fits mounts made by Explore, Meade, Celestron, Vixen & others.

• The Explore ED127 Essential Series telescope weighs 18 lb.

Recent Upgrades

• For improved collimation, a new precision front cell with push-pull adjustments enables tilt and centering modifications.

• Now includes a 2″ Dual-Speed Rack & Pinion focuser with heavy-duty locks and rotation adjustment for positioning and holding your imaging system.

• The dew shield is now retractable and therefore enhances portability.

• The hybrid finder scope base can accept all legacy Explore Scientific finder scope brackets, as well as the mini dovetail type (Vixen, Synta, Celestron). Made of rugged, black anodized metal with chrome-plated metal screws.