Featuring a 1:4 zoom ratio, the Titan Tool Supply Model ZMM-1 industrial inspection zoom microscope offers constant focal length, highly favorable depth of field, a large field of view at 15X magnification, and a higher magnification with smaller field of view at 60X as standard. When used with the optional extra 20X eyepiece, the Model ZMM-1 can additionally perform reliable and accurate remote visual inspections of a workpiece over an expanded magnification of up to 120X –all without the need for a change of lens.