Filters Thermal safety,UV,Red-free,Cobalt Blue Aperture Diameter 14mm,8mm,3.5mm,0.5mm SpecificationsS280Microscope TypeGalilean-TypeMagnification ChangeNon-continuous 5-step revolving drumTotal Magnification Ratio10X 16X 25X(standard configuration) 6X 10X 16X 25X 40X(professional configuration)Eyepieces12.5XAngle Between Eyepieces13°Pupillary Adjustment52mm~78mmDiopter Adjustment±6DIllumination ...