|   | Specification | Model | 
        
            | BXSB-310P | BXSB-301B | BXSB-103B | BXSB-102B | BXSB-301A | 
        
            | Viewing Head |   Compensation Free Binocular Head inclined at 30 |   |   | * |   |   | 
        
            | Compensation Free Trinocular Head inclined at 30 | * | * |   |   |   | 
        
            | Compensation Free Binocular/Trinocular Head inclined at 45 |   |   |   | * | * | 
        
            | Nosepiece | Ball Beating Quadruple Nosepiece | * | * | * | * | * | 
        
            | Eyepiece | WF10X18mm | * | * | * | * | * | 
        
            | Objective | Plan Achromatic 4X,10X,40X(S)100X(S,O) | * |   |   |   |   | 
        
            | Achromatic 4X,10X,40X(S)100X(S,O) |   | * | * |   | * | 
        
            | Achromatic 10X,20X,40X(S)100X(S,O) |   |   |   | * |   | 
        
            | Stage | Double Layer Mechanical Stage 135*140mm | * | * | * | * | * | 
        
            | Condenser | Abby NA1.25 condenser with Iris Diaphragm &filter,rack&pinion adjustable | * | * | * | * | * | 
        
            | Illumination | Build-in Illumination,Halogen lamp6V/20W,Power supply 220V | * | * | * | * | * | 
        
            | Package | Each set in styrofoam,to cartoon for safety | * | * | * | * | * |