The worldrsquos first 180mm 11 macro lens with a fast f28 maximum aperture this lens includes three fld glass elements that have a performance equal to fluorite and ensure exceptional correction of axial chromatic aberration and lateral chromatic aberration a floating inner focusing system moves two different lens groups in the optical path to different positions this system compensates for astigmatism and distortion and provides extremely high optical performance from infinity to 11 macro the