... working distance, large depth of field. XTL-II series zoom stereo microscopeXTL-II possess the advantage of long working distance, large ... identification ,and gem identification. Part NameTechnical SpecificationXTL-IIXTL-II(F)XTL-II(L)Total Magnification7.5X-35X3.75X-140X(with xl ... support(IIstyle)stand support(L)Basearm stand big base(II),180×220mmstand style big base (L),155×225mmIncident lightHalogen ...