40 mm Konig MK-70
This 40 mm eyepiece, with a fantastic 70 degree apparent field, comes close in performance to the legendary Konig 7/70! The perfectly balanced eye relief is very forgiving in that your eye does not have to be perfectly on axis to get the full effect of the wide view. The multicoated system produces a stunning "seamless velvet black" background to the diamond bright star images. New low dispersion camera quality glass lends itself to this advanced optical design. For medium to large aperture instruments, the Konig 40 mm MK-70 is wide field perfection.
It normally sells for $195.95, but I'm selling it for $175 shipped and insured. The eyepiece is in excellent condition and less than a year in use.