The Canon EF 24-105mm f/4 L IS USM is one of the best lenses around. the body is made of metal and this gives it an excellent build quality, which makes the images taken fantastic. It has both manual and automatic focus, allowing you to switch from one mode to another quickly and extremely silently. Being a modern lens, it is resistant to any climatic adversity: whether it is snow or rain, the Canon EF 24-105mm f/4 L IS USM guarantees you protection and reliability from this point of view. The rings are made of rubber and ensure fluidity and speed, as well as very good precision. USM (ultrasonic motor) is a fundamental feature for the latest generation lenses and this one has it. It has AF (autofocus) and is also very silent, which is absolutely not to be underestimated given that it is possible to use the lens not only for photos but also for videos. It has good sharpness, although it suffers a little at the corners, but still, it won't be a problem: many professionals who have purchased this lens have not felt this much difference. Vignetting is present but disappears as soon as the aperture is opened larger. The stabilizer is incorporated into the lens and allows you to photograph even moving subjects. It is an exceptional lens, it is recommended by the best professionals and takes extraordinary photos even with distant subjects. Excellent quality/price ratio.