National Optical 167 Advanced Series Binocular Biological Microscope (167, 168, 169)

Superior in design and performance, National Optical's 167 Series incorporates a wide range of features designed for university and laboratory use. Superb optical clarity and reliable mechanical engineering assure years of top performance. Choose from four grades of objective lenses - semi-plan, super high contrast, plan, and plan phase. All objectives are parfocalled, parcentered, and color-coded. All models have WF10X Eyepieces, 1.25 Abbe Condenser, LED illumination, and mechanical stages.  Trinocular versions include video C-mount adapter (930-005). OPTICAL SYSTEM Widefield 10x /18mm eyepiece 45° inclined monocular viewing head rotates 360° for easy sharing by more than one student DIN standard 4x (0.10 N.A.), 10x (0.25 N.A.), 40xR (0.65 N.A.) and 100xR oil immersion (1.25 N.A.) semi-plan objectives. All are parfocalled, parcentered and color-coded Quad objective turret is ball-bearing mounted for smooth, precise positioning of objectives, features textured rubber knurling for eas