Convert the LEICA trinocular microscope phototube/head/port to traditional C-Mount type With different built-in reduction lens (1X, 0.7X, 0.55X, 0.35X) 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)