7.5mm 12.5mm Set Sirius Plossl Eyepieces These 12.5mm and 7.5mm Orion Sirius Plossl eyepieces are ideal for all types of telescopes Each eyepiece offers a 52-deg apparent field of view for clear, sharp images of impressively high contrast Mullti-coated for excellent light transmission Lens edges are blackened to reduce scattering of stray light and maximize contrast Threaded for use with 1.25" eyepiece filters