Tiyoda HI 90 1.25 0.8 N.A. Variable Aperture Oil Immersion Objective 90x RMS
Tiyoda · HI 90x · Variable Aperture. Magnification 90x. Aperture Type Variable aperture — built-in iris diaphragm. Thread RMS. N.A. Range 0.8–1.25 (variable via built-in iris diaphragm).