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The Celestron X Cel LX 18 mm Eyepiece has a brand new sleek, robust design and a twist up eye guard. These eyepieces are especially designed for comfort and ease of use. They also have a wide 60 deg field of view and 6 element fully multi coated optics for magnificent wide field performance. X Cel LX eyepieces are parfocal and require little to no focusing when changing from low to high power. Features Wide field of view enhances views of the night sky through a single lens 6 element fully multi coated optics create sharper images Extendable twist up eyepieces are easier and more comfortable, especially for eyeglass wearers No slip, rubber grip ring for secure handling, even in moist conditions Parfocal eyepiece require little to no focusing when changing from low to high powerSpecificationsSuitable for Celestron SCT Telescope Focal Length mm 18 mm 0.71 inAngular Field of View deg 60 degEye Relief mm 16 mm 0.63 inOptical Coatings Fully multi coatedBarrel Size 1.25 in 32 mm
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