C1C2ID.32mm for PoleID.76mm for Microscope BodyDist.Centre-to-centre:155mmThe Vertical W.D.50mmPlane frame, dovetail rack focusing mechanismThe Vertical W.D.50mmID.24.5mm for PoleID.76mm for Microscope BodyC3C4Mounting Dia.16mmID.76mm for Microscope BodyThe Vertical W.D.50mmID.76mm for Microscope BodyThe Vertical W.D.45mmC5C6ID.76mm for Microscope BodyThe Vertical W.D.47mmID.32mm for PoleID.76mm for Microscope BodyDist.Centre-to-centreThe Vertical W.D.:45mmThe Precision:0.002mmDTZ Focusing MountDTB Focusing MountID.25mm for PoleID.50mm for Microscope BodyDist.Centre-to-centre:140mmThe Vertical W.D.62mmID.25mm for PoleID.50mm for Microscope Bodyist.Centre-to-centre:140mmThe Vertical W.D.42mm