Advanced Optical Accessories: The use of aluminum allows for a longer service life; it with less distortion in the field of view; providing the best in high performance and clarity with low chromatic aberration; giving a virtually distortion-free image
52 Degree Wider Field of View: 56mm focal length for low magnifications and an excellent overview; 52 degree field of view-enjoy observing a large section of the night sky; providing a broader perspective
Fully Mutiple Coated HD Optical Glass: Multi-coating to prevent unwanted reflections; thus reducing chromatic aberration and increasing lens transparency for a bright clear view and impressively high contrast
Fits in 2inch telescope focusers; and accepts 2inch eyepieces or accessories; threaded for use with standand 2Inch astrophotography filters
Features two locking thumbscrews to secure any inserted astronomy accessory; with a brass compression insh to prevent the marring of your telescope accessories