Trinocular head with interchangeable pairs of 10x and 16x widefield eyepieces and sliding head with 55 to 75mm interpupillary adjustment fixed 30-degree vertical inclination to reduce eye and neck st Trinocular head with interchangeable pairs of 10x and 16x widefield eyepieces and sliding head with 55 to 75mm interpupillary adjustment fixed 30-degree vertical inclination to reduce eye and neck st Forward-facing quadruple nosepiece with 4x 10x 40xS and 100xS (oil) DIN plan optical-glass objectives that provide improved focus over the entire field of view Episcopic (reflected) and diascopic (transmitted) illumination system has halogen illumination with rheostat to control light intensity Double-layer mechanical stage has 1mm stage divisions with 0.1mm vernier graduations and stage stop; graduated coarse and fine focus with tension control to prevent stage drift