Sky Mentor 5X Five Element Barlow Lens - 2" - 5X5BAR-2 2" Diagonals you may encounter "nose relief"

you may encounter "nose relief" limitations because DIOPTRX" reduces the normal eyepiece eye relief

The Tele Vue 3mm-6mm Nagler Zoom is small

Tele Vue Product Number: EDL-17

Celestron Echelon Binocular sport high quality 70 mm objective lenses made in Japan

One aspect to optimizing this correction is the distance of the eyepiece's focus point (field stop location) to the last surface of the Paracorr lens (within a small +/- tolerance of course)

Sky Mentor 5X Five Element Barlow Lens - 2" - 5X5BAR-2 2" Diagonals you may encounter "nose relief"Sky Mentor 5X Five Element Barlow Lens 2" The Sky Mentor 5X Five Element Barlow Lens 2" will come in handy for extending the effective focal length of short tube telescopes, to give them more magnifying power. It is the most powerful 2 inch barlow in existence, period! This five element Barlow lens employs a sophisticated 5 element lens configuration engineered to render optically flatter, sharper images than standard barlows can provide. The lenses