I bought it to expand the focal length, planning to use it from time to time. A couple of days of intensive shooting showed a simple fact: this lens is a workhorse that requires skillful handling. If your hands are shaking, if you set long exposures without a tripod and shoot in the sun, you will get blur and chromaticity. If there is a desire to learn how to shoot clearly, if your hands do not tremble and you know how to catch light, the lens will pleasantly surprise you. He is definitely at the top of his class.