I have a mint condition 12mm BST Explorer for sale. Bought a few months ago. Comes with caps and box.
Has a 60° AFOV and good eye relief. The eyecup screws up and down like Pentax eps. Performance is surprisingly good. On star fields I like it better than my Pentax XF 12mm as it has a flat field.
Selling because I have too many eyepieces in similar focal lengths.
Unlike the 12mm Paradigm/Starguider models, the BST has
blue accents on the body, not red (this was disappointing cos I wanted it to match my red SV66ED!
)
Asking $75 ono.
Enquiries by PM please.