Fist of all, I thank Susan P, Atkinson, NH, sending me her lenses for my review.
This lens carries 'Canon' brand name, U (ultrasonic motor) sign and a metal lens mount. All these make it a popular telephoto lens for Canon AF camera users. In the USA used market, it's easy to sell it at a price more than USD 100, twice as much as a zoom with the same configuration from a lens specialist manufacture.
The lens extends while its zoom ring turning from 75 to 300mm. Turning the focus ring also changes the lens' length. No distance and DOF scales are marked on the barrels. You will not find the magnification ratio neither. The lens, made in Malaysia, accepts 58mm filter, and has a 1.5m (4.9ft) macro sign.
The lens is long, ~5 cm longer than my Sigma 75-300mm. The build quality of this Canon lens is average.I feel that the internal barrel and focus ring are loose in this lens, although Susan says very little use (580978wuD). On used ones, I saw broken rings, lost resistance in zoom ring (stand up the lens on its rear end with a rear cap, set the zoom to 300, open you hands and see if the internal barrel falls in or not by itself; If does, you have to hold the zoom ring when shooting something such as a bird up on a tree). Better to test-use one before buying it.