The Orion 7.5mm & 12.5mm Highlight Plossl Power Pair Eyepieces are excellent image quality, good eye relief, wide fields of view and affordability. For planetary and lunar viewing, especially, the 12.5mm and 7.5mm high-power oculars included in this Highlight Plossl Power will have you discovering new detail. Even if you already use a 9mm or 10mm eyepiece, with this pair you can add more magnification options. The HighLight eyepieces offer a generous 52° field of view (43° for the 40mm) and crisp, sharp images. But the HighLights' 4-element optics are not just fully coated or multi-coated, but fully multi-coated. That means that every air-to-glass lens surface is multi-layer coated for the highest possible light transmission and better contrast. You'll see more of those pinpoint star images and more faint detail in deep-sky objects. In addition, the lens edges are blackened for additional contrast enhancement. The machined aluminum housings of the HighLight Plossls sport a distinctive anodized finish, with grip traction knurled right into the metal. The supple rubber eyeguards shield out extraneous light and fold down for eyeglass wearers. Like all Orion eyepieces, the barrels of HighLight Plossls are precision-machined to a tolerance of +/- 0.05mm from the nominal specification, so you can be sure of a great fit in your diagonal or focuser. HighLight barrels have a setscrew safety recess to reduce the risk of an eyepiece falling out should the locking setscrew become loose. And of course they are internally threaded to accept filters. Each HighLight Plossl eyepiece comes with top and bottom end caps for protection against dirt and stray fingertips.