Ca be i stalled i Zeiss UIS tri ocular tube such as:Zeiss Axiolab series,Zeiss Axioscope series,Zeiss PrimoStar series,Zeiss Axiovert series,Zeiss Stemi series,Axiophot-2 Axiopla -2 Axioskop-2 Axiostar Axiotech Series microscope\u003cbr />Build of material: a odized alumi um;\u003cbr />Telece tric optics with low light deficie cy;\u003cbr />Parfocal with differe t microscope objective le ses;\u003cbr />Diffractio limited MTF;\u003cbr />Aperture totally coupled with UIS microscope objective's exit pupil;