RF24-70mm f/2.8L IS USM is the first f/2.8 standard zoom lens capable of 5 shutter speed stops of Image Stabilisation. It is one of the long awaited lens, even by professionals. Equipped with a constant f/2.8 aperture and a 9 bladed circular aperture diaphragm, RF24-70mm f/2.8L IS USM can deliver beautiful images in low light environment and creamy bokeh. Unique to RF lenses, the additional control ring on the barrel of EF24-70mm f/2.8L USM III that could be customised to control exposure settings; providing a more intuitive control especially while shooting.