The FUJINON XF100-400mmF4.5-5.6 R LM OIS WR is a super telephoto zoom lens that covers a 35mm focal length equivalent of 152-609mm (with the XF1.4x TC WR teleconverter attached the XF100-400mm becomes 213-853mm).The high performance optical construction of 21 elements in 14 groups includes five ED lenses and one Super ED lens to help reduce chromatic aberration that often occurs in telephoto lenses.