Purchased new from Scopetronics and used with a Nikon coolpix 4500 camera. Took some awesome pictures. From Scopetronics website...
To use the Wide Angle Eyepiece as a Nikon adapter simply unthread the eyeguard to reveal the integral 28mm Nikon thread. This thread will screw directly into many Nikon cameras such as the 800/900/990/995/4500 and many more with the proper adapter (such as Nikon 880/885/5000, and Sony 37mm cameras).
Sell $84.00 plus $5.00 shipping via UPS Ground
Payment via money order or (PayPal +3%) Thanks - Ron