Convert the Cral Zeiss trinocular microscope phototube/head/port to traditional C-Mount type (25.4 mm or 1 inch diameter with 32 threads per inch); With different built-in reduction lens for achieving better field of view from microscope trinocular head suitable for 1”, 2/3”, 1/1.8”, 1/2”, 1/2.5”, 1/3” or 1/4” inch CCD or CMOS sensor chips); Build of material: anodized aluminum; Telecentric optics with low light deficiency; Parfocal with different microscope objective lenses; Diffraction limited MTF; Aperture totally coupled with UIS microscope objective’s exit pupil.