The Orion 10mm, 17mm & 25mm HighLight Plossl Starter Eyepiece Set provides excellent image quality, good eye relief, wide fields of view and affordability. This Highlight Plossl Starter Set represents an ideal upgrade set to replace lower-quality eyepieces, it includes three must-have focal lengths for low, medium and high-power viewing: 25mm, 17mm and 10mm.
Like the Sirius Plossl line, 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. 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.