Featuring mineral optics that deliver swindler pictures with less optical aberration, the new large-diameter EF 600mm f/4L IS II USM super optical lens additionally takes advantage of metal and metal construction for a lighter weight and a element coating that keeps soilure, smears and fingerprints to a minimum. as a result of image stabilization technology in super pic lenses could unknowingly over-compensate and interfere with composing and framing distant or moving subjects, the EF 600mm f/4L IS II USM includes a complicated third Image Stabilization mode (Mode 3) that activates is merely once the shutter button is totally ironed. this permits users to pan fast-moving subjects then activate is merely once it's exactly needed. as a result of all 3 IS modes provide the equivalent result of up to four additional stops of performance, and since and the facility Focus mode permits sleek focus modification once shooting video, the EF 600mm f/4L IS II USM is good for capturing rapid-fire action. alternative enhancements like higher dust- associated waterproofing build the Canon EF 600mm f/4L IS II USM super optical lens an immoderate superior Digital Age tool combining Canon hallmarks of excellent ease-of-use with glorious sturdiness.