... field, phase contrast, photography, fluorescence, biological polarization and television etc. Specifications Optional Accessories High-point Eyepiece WF10X ... Condenser Abbe NA=1.25 with Iris Diaphragm and Filter Holder Illumination 6V20W T-H Lamp with ... Annular, Phase Contrast Condenser, Centering Telescope, Green Filter Field Diaphragm Collector with Field Diaphragm Polarization Attachments Simple ...