関連ワード:  diaphragm knob microscope function    diaphragm lever microscope function    function of light source knob in microscope    iris diaphragm knob microscope function    diaphragm adjustment knob microscope function    iris diaphragm lever microscope function    field diaphragm lever microscope function    aperture iris diaphragm knob microscope function    base adjustment knob microscope function    diaphragm microscope function