Optical Infinity Corrected Optical System Head Gemel type of binocular head,30'' inclined Gemel type of trinocular head, 30'' inclined Gemel type of binocular head, 30'' ~60'' inclined(Designing) Eyepiece PL10X22mm high eye-point plan eyepiece Nosepiece Reversed quintuple nosepiece, reversed quadruple nosepiece for optional. Objective Infinity plan achromatic objective 4X,10X,20X,40X,100X. Plan phase contrast objective 10X,20X,40X,100X Focus lowerness locate Coaxial focus system Stage 175mm *145mm mechanical stage, adjusting for right or left hand. 75mm * 50mm moving range. Condenser N.A.1.2/0.22 swing achromatic condenser N.A.1.25 five position phase contrast condenser N.A.0.9 dry darkfiled condenser. N.A. 1.25 wet drakfiled condenser. Illuminator Built-in koehler illuminator systems. 6V/30W halogen bulb,adjustment of brightness.