Premium Optical Device: Aluminum alloy material is used to make it last longer; perfect for broad-field lunar observations; medium-sized star clusters and a wide range of cloudy nebulae; obtaining better observation results during astronomical journey
50 Degree Field of View: 1.25 inch 10 mm plossl eyepiece set offers a wider 50 degree field of view and a 10 mm focal length for observing larger objects; giving the wider view field along with extra sharpness and long eye relief
Fully Muti-Coated Optical Lens: 4-Element Optical Lens; providing bright; sharp images and excellent color correction and the fully coated groups on each lens surface maximize light transmission; contrast; and image clarity
Fully Multi-coated: Astromania 4mm Super Plossl eyepiece is engineered with 2 sets of 5 element design with fully multi-coated; the high-quality optics that minimize internal reflections and improve contrast
52 Degree Field Of View: The eyepiece have a wider 52 degree field of view than most eyepieces with a 4mm focal length and 6mm eye relief to see more detail; You can choose eyepiece with the right focal length for your telescope model which are parfocal