Here is a Like New 3-6mm Zoom.
Can't say much more!
325.00 shipped CONUS
This high performance, high-contrast, high power eyepiece is ready to take its place among the best planetary eyepieces available... but with a "Nagler" twist. Al incorporated his proven "Nagler" concept into a zoom, while optimizing for the performance factors critical to planetary observers; contrast, resolution, and comfortable eye relief. The Nagler Zoom is "tack-sharp" across its constant 50° apparent field, and throughout its 3mm-6mm focal length range, even in fast APO scopes. The 3mm-6mm Nagler Zoom is parfocal throught its zoom range, parfocal with other Tele Vue 1.25" eyepieces, and has a constant 10mm eye-relief.
Click Stops at 3mm, 4mm, 5mm, and 6mm
Blackened lens edges
Anti-reflection threads and filter threads