The Canon EF 28-135mm f/3.5-5.6 IS USM is a standard lens, that is, it is one of those that include the greatest amount of variants. This landing produces good quality images and there are no particular distortion problems or chromatic aberrations. Focus takes place by ultrasound AF engine which turns out to be silent and precise. The image stabilizer is present but a little noisy, therefore not very effective if you want to shoot videos. It has a minimum fire distance of 50 centimeters and the chasters are not included. For outdoor photos with good light conditions, it turns out to be a good lens, vice versa, indoors or with little light it is necessary to combine it with a flash or other source of artificial light. The Canon EF 28-135mm f/3.5-5.6 IS USM is suitable for any kind of photographer, by the professional who tries to increase his setting to the amateur who seeks a versatile lens, without being forced to a great economic investment. Its greater use, where it seems to be more effective, is for landscape photos.