The newly enhanced x cel lx eyepiece series is what youve been waiting for in a high quality eyepiece for planetary viewing with 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 degree 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 available