"RF24-70mm f/2.8L IS USM is the first f/2.8 standard zoom lens capable of up to 5 shutter speed stops of Image Stabilization. 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 RF24-70mm f/2.8L IS USM that could be customised to control exposure settings; providing a more intuitive control especially while shooting. Filter Size: 82mm Max aperture: f/2.8 Image Stabilisation of up to 5 stops With Nano USM Additional Control Ring Dust and Drip Resistant "