TV digital microscope Eyepieces :0.5x reducing lens for CCD or CMOS camera PC connection Zooming range:0. ... -4.5x, ratio 1:6.52)Eyepieces:0.5x reducing lens for CCD or CMOS camera3)Working distance:95mm4)Boom stand ... .35X, 1x, 1.5x, 2x reducing lens for CCD or CMOS camera6)Optional barlow lens:0.3x, 0.5x, 0.75x, 1x ...