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  • ed80cf_diagonalExplore the entire line of ED Air-Spaced Triplet Apochromatic Refractors
Explore Scientific Telescope Optics


Precision Optics


The science of astronomy, or "law of the stars" ("astro" is Greek for "star", and the word "nomos" means "law"), has been around for thousands of years, but it's only been twelve generations since telescopic optics were first aimed towards the sky. The first explorers of the heavens were amateur astronomers, and their discoveries changed everything, from the way we view the universe around us to the way we think about our existence here on Earth.


Designing and manufacturing optics is at the heart of what we do. Explore Scientific designers and optical craftspeople constantly strive to produce optical tools that will deliver the precision and dependability that explorers of the Universe deserve, regardless of their level of expertise.


Producing optics of this caliber requires a solid design, careful fabrication, and multiple tests throughout the manufacturing process, but it also takes a dogged determination to keep perfecting our processes and skills so that our products keep getting better and better. To further insure your faith in Explore Scientific products, we back all of our telescopes with the Explore STAR Transferrable, Extended Life of the Product Warranty, so you can keep exploring!

Explore STAR Forever Product Warranty


Explore STAR Warranty


We are always striving to improve the quality of Explore Scientific eyepieces and to enhance your experience as a user of our products. This is why we created the Explore STAR Forever Product Warranty Program.


EXPLORE SCIENTIFIC branded products purchased in the Americas, Japan, and Australia are under warranty forever, and this warranty is transferrable from owner-to-owner as long as the product is registered with EXPLORE SCIENTIFIC.

This Transferrable Unlimited Lifetime Warranty covers any problem no matter what the cause. In addition, this new warranty supersedes and is retroactive for EXPLORE SCIENTIFIC branded products that are already serving in the field, provided they are registered with us. That means that no matter what the cause of the problem, no matter if you are the second or the 20th owner, we will take care of your EXPLORE SCIENTIFIC branded product without any repair or replacement fees.

*Explore STAR Warranty is in the Americas, Japan, and Australia and its territories, extended to our Transferable Unlimited Lifetime Warranty when product is registered on the available Explore Scientific Branded Products.

Certain local or state laws do not allow limitations on implied warranties or the exclusion or limitation of certain damages. If these laws apply to you, some or all of the disclaimers, exclusions or limitations may not apply to you, and you might have additional rights.


Learn More about Explore STAR

Reviews and Comments from Experts and Users


Reviews & Testimonials


Read reviews and comments from experts and owners to determine if an Explore Scientific telescope is the right tool for you:


  • Jerry Hubbel - ED127 & Telescope Drive Master

  • Chuck Kimball - ED80, Comet Hunter, & ED127

  • Mark Sibol - ED102

  • Mike Wiles - ED127

  • Cloudy Nights Forum - ED127