This eyepieces is the same as the Celestron Axioms. Has same specifications as the 23mm Axiom in regards to eyerelief, etc. Has a 69 degree field of view. Views are very sharp and good contrast. Only slight fall of at the edges of my F5 newt. and none in my F10 refractor or SCT. Some marks from set screw. With original caps and winged eyeguard. Asking $100 shipped. Thanks.