The Canon EF 24-70mm f/2.8L USM is a professional-standard zoom lens renowned for exceptional optical quality and robust construction. With a constant f/2.8 aperture throughout its versatile 24-70mm focal range, this lens is ideal for professional photographers working in challenging lighting conditions and requiring precise depth-of-field control. Featuring two aspherical lens elements and one ultra-low dispersion (UD) element, the original version delivers superior image quality with minimal chromatic aberration and distortion. The inner-focusing system with ultrasonic motor (USM) provides fast, quiet and accurate autofocus performance, while the all-metal construction and weather-sealed design ensure durability and reliability in demanding professional environments. A true workhorse lens found in the kits of countless professional photographers worldwide.