Edmund Scientific RKE 32mm

5.0 Incorrect info in heading above.

Very sharp, wide field, good contrast. Not terribly expensive. Good eye relief.

Not threaded for filters.

Edmund still sells this eyepiece in its Industrial Catalog for $225. This is a 6-element eyepiece. It is composed of 3 achromats, hence 6 elements.

The eyepiece prototype called for 68 degrees, but the production model has an 82 degree field. It is very sharp in the center - the sharpest I have ever used - with good edge correction in mid to longer focal ratio scopes. It also seems to work well in any Newtonian. It is a 2" eyepiece with a whopping 42.7mm field stop. Incredibly wide field, good contrast and good eye relief of 18mm.