The Canon EF 70-200mm f/4 L IS USM - is an excellent lens that differs from its counterpart, the Canon EF 70-200 f / 4.0 L USM, in the presence of a 4-stop stabilizer. This means that you can not only take advantage of all the advantages of the "namesake", but also expand the range of your capabilities. An in-lens stabilizer will allow you to shoot at shutter speeds up to 4 stops slower in the same situation, as it compensates for camera shake when the shutter is released. Otherwise, the Canon EF 70-200 f / 4.0 L IS USM is a great light telephoto lens for capturing distant subjects, portraits with beautiful bokeh and other subjects that don't require a wide angle of view such as flowers, animals, sports events, from an ambush, etc. Unlike heavier counterparts with f / 2.8 aperture, it will be convenient on long trips, at weddings, as well as in other situations where large sets of equipment force the photographer to look for opportunities to reduce the total weight without losing quality ... We especially recommend to pay attention to it for photographers who do not know the shooting location in advance, as well as for those who shoot indoor sports. Despite the increase in the number of elements in the optical scheme of the lens, Canon has managed to achieve high quality images with the Canon EF 70-200 f / 4.0 L IS USM. Sharpness across the entire field of the frame is slightly worse in the corners than on its counterpart without a stabilizer, chromatic aberrations and kick drum are slightly more noticeable. However, bokeh, color rendition and contrast in the lens remained at the same high level. Constant aperture at all focal lengths allows you to maintain the same exposure parameters, but its value - f / 4.0 - may require a flash or a lens with a higher maximum aperture for shooting in low light conditions. Thanks to the USM ring focusing motor, the lens focuses quickly, quietly and accurately. The Canon EF 70-200 f / 4.0 L IS USM is compatible with extenders that extend focal lengths, but keep in mind that using an extender will reduce the lens' maximum aperture by 1.4 or 2.0 times depending on which extender you are using. are using.