With differe t built-i reductio le s (2.25X, 1.5X,1.2X,1X, 0.8X,0.63X, 0.5X, 0.35X) for achievi g better field of view from microscope tri ocular head(suitable for 2.7”, 1.8”, 4/3”, 1”, 2/3”, 1/1.8”, 1/2”, 1/2.5”, 1/3” or 1/4” i ch CCD or CMOS se sor chips);\u003cbr />Ca be i stalled i UIS tri ocular tube such as : HUVITZ HRM series, HSZ series microscopes;\u003cbr />Build of material: a odized alumi um; Telece tric optics with low light deficie cy;\u003cbr />Parfocal with differe t microscope objective le ses; Diffractio limited MTF;\u003cbr />Aperture totally coupled with UIS microscope objective’s exit pupil;