The Motic 1100201300041 SMZ-161-TH Trinocular Head employs the Greenough stereoscopic optical system which enables large-scale zoom ratio with the clearest distortion-free image that has a high depth of field. It displays sharp, three-dimensioned images and wide field of view. It is designed with a comfortable viewing angle of 45°, which meets the ergonomic requirements. It comes with widefield eyepieces (WF10X/20mm), eyetubes and objective (0.75X-4.5X).