... Immunology, Environmental Protection, Microchemistry, Analysis of Sedimentary Rock, and Inspection of Impurities in Semiconductors.Also Capable of Transmitted ... Slider Assembly: Blue Filter, Green Filter, and No Filter for Brightfield Microscopy.BrightField: Transmitted Light ... Knob, Iris Diaphragm, Swing-Out Filter Holder, and Condenser Alignment Screws.BrightField: Four BrightField Filters Included: ...