Constant f/2.8 aperture Strong L series construction 38cm close focus distance The Canon EF 24-70mm f/2.8L II USM lens sits between the wide angle and telephoto, providing a fast, constant aperture as well as a robust construction. With a constant f/2.8 aperture the Canon EF 24-70mm f/2.8L II USM is capable of taking images in lower light without needing to increase ISO. The constant aperture is also beneficial for shooting fast moving subjects, as it improves the focus time and allows for faster shutter speeds to be used. Also assisting the focus speed is the Ultrasonic motor, which achieves sharpness rapidly and quietly. The Canon EF 24-70mm f/2.8L II USM can focus up to 38cm away from the lens, giving plenty of versatility for nearby subjects. A fast, and razor sharp standard zoom lens, perfect for all those looking for the highest quality Canon lens.