** SOLD, thank you Mark and Astromart **
Selling my 40mm Antares Erfle eyepiece (2" format, 65deg). New these run $100 plus shipping ... selling this one for $80 including shipping in CONUS.
Excellent condition. Used frequently but gently in a compression type diagonal, and optically and cosmetically hard to tell from new.
This is an ideal widefield eyepiece for a scope like an f10 SCT where the Erfle design shines. I wouldn't recommend it for fast dobs, because the exit pupil becomes too large and edge abberations will become noticeable.