With their 66° apparent field of view, our Expanse wide-field eyepieces will definitely turn up the "Wow!" factor in your telescopic deep-sky observing sessions. Imagine taking in celestial objects like the Andromeda Galaxy, the Double Cluster of Perseus, or the star clouds in Sagittarius in one sweep - with an Expanse eyepiece in your telescope focuser, you can!
Expanse oculars have big eye lenses and great eye relief (13mm to 17mm). Eyeglass wearers can view the entire field without removing their glasses. All eyepiece elements are fully coated, with the outer lens multi-coated for additional light transmission.
You will be impressed, as we were, with the sharpness of these eyepieces as well as with the good color correction and contrast. And compared to typical Plossl eyepieces with their 52° apparent field of view, you'll quickly become spoiled by the dreamy and wide 66° window of the Expanse.
Each 1.25" aluminum eyepiece barrel is threaded for filters and internally blackened to eliminate internal light scattering. A setscrew safety recess is machined into each barrel to prevent the eyepiece from falling out should the locking setscrew inadvertently loosen up. Fold-down rubber eyeguards enhance contrast by blocking stray and peripheral light.
With our Expanse telescope eyepieces you get a super wide field of view and superior optical performance. And check out the price. You also get a bargain! Sold individually or in a money-saving set of four.