Dedicated eyepiece for use with specific EDG series Fieldscopes. Delivers bright, clear images at 25x magnification when attached to an EDG Fieldscope model with an 85 mm objective lens, and at 20x 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. Boasts an exceptionally long eye relief, which makes this eyepiece the ideal choice for sketching or if you wear glasses.