This is the new 40 mm, with a fantastic 70 degree apparent field. 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 nun MK-70 is wide field perfection. Asking $175.00 shipped or possible trade for a TeleVue 5x powermate
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