is fully coated optical system with super high resolution.It is ideally suitable for Industrial as well as for biological research where high precision, Maximum working distance and large field coverage is required.Eyepiece WF 15X/FN 15, WF 20X/FN 10,Binocular head 45' Inclined, 360' Rotatable,can be locked in any position desired. Interpupillary distance adjustment 54-75mm, working distance 30-165mm Illumination transmitted & reflected 5v/3w LED, with independent switches and adjustable intensity