Dedicated eyepiece for use with specific Nikon EDG Fieldscopes. Delivers bright, clear images at 30x magnification when attached to an EDG Fieldscope model with an 85 mm objective lens, and at 24x magnification when attached to a model with a 65 mm objective lens. Features a bayonet-type mount with lock for quick and secure attachment to the Fieldscope and interchangeable eyecups for general use and digiscoping with certain Nikon COOLPIX cameras.