Viewing Head:   
Binocular or trinocular body, 30 degree inclination, by model. Attachment fitting slotted for correct orientation.    
Revolving Nosepiece:   
Ball-bearing quadrupole nosepiece with one fixed and three centerable objective apertures.    
Eyepieces:   
HWF 10X Focusing eyepiece with cross-line reticule in right-hand fixed eyetube and a standard HWF 10X eyepiece in left-hand adjustable eyetube.    
Objectives:   
Strain free objectives SM Plan 4X NA 0.10, SM Plan 10X NA 0.25, SM Plan 40X NA 0.65.   
Analyzer:   
Rotatable analyzer in slider mount with 360 degree graduations.    
Bertrand lens:   
Bertrand lens with field-limiting stop, sliding for E-W insertion.    
Polarizer:   
Swing-out click/clamp mount, fully rotatable with click stop at 0 and 90 degrees.   
Condenser:    
Strain free Achromatic condenser, NA 1.25 with aperture iris diaphragm and swing-out filter holder.    
Illuminator:   
Built-in base Koehler illuminator, 50W halogen lamp with intensity control.