[PhilW]

For sale is a Nikon 17mm fieldscope eyepiece. It has lovely coatings, as can be seen in the photo, & is a great deep-sky eyepiece. It comes with original box and caps.

One issue: the barrel size is non-standard. It has an inner barrel 23mm wide, on which you can fit a 0.965"/1.25" adapter. It also has an outer shoulder 1.25" wide, which is threaded for most of its length.

$100 shipped.