... N.A.1.25 Abbe Condenser Stage:188x150mm BF12146A Binocular Biological Microscope NameParameterEyepieceFE12146,FE12146TWF10X/Φ18mmFE12146A, FE12146ATWF10X/Φ22mmObjectiveFE12146,FE12146TAchromatic Objectives:4X ,10X ,40X ... Iris diaphragm and filterOther partsPhase contrast attachment, Simple Polarization unit Biological Microscope