the Canon EF 75-300mm f/4-5.6 III USM lens is a telephoto lens compatible with APS-C and FullFrame reflex cameras from Canon's EF series; It works with a focal length varying from 75mm to 300mm and with a field angle between 32.2 and 8.3 degrees. The Canon EF 75-300mm f/4-5.6 III USM features 13 lenses divided into 9 optical groups and has a reproduction ratio of 0.25x. The zoom is a ring and is external, the focusing takes place via an ultrasonic motor and there is no image stabilization; the lens hood is available separately and consists of the Canon ET-60 model. The diameter of the filters is 58mm, while the dimensions are equal to 71mm in diameter by 122mm in length; the weight is 480 grams. The Canon EF 75-300mm f/4-5.6 III USM is built with a very respectable optics and considering its dimensions it is decidedly light; it is a very versatile lens, therefore suitable for every situation. The photos taken with this accessory have a good balance and express themselves particularly well with the colors, realistic and well blended in every exposure, especially in panoramic shots with little light; in some conditions the reproduction of details deserves particular consideration, as it is worthy of decidedly more expensive and refined telephoto lenses. Ideal for: this telephoto lens is among the cheapest on the market; an excellent choice for those looking for a product with an advantageous quality-price ratio that works well in any weather and lighting condition.