For photographers who love the idea of having a good zoom lens in their tool bag, the Olympus Zuiko might be the perfect choice. Weighing in at 15.2 oz and measuring just 4.5 inches long, the lens is good for traveling. Use this Olympus camera lens in the field to capture images of landscapes, mountains, and even portraits, in a nice choice of focal lengths. This 75 - 150 mm f/4.0 lens is a two-touch zoom camera lens with manual focus. The main focal ring has distance scales printed in an easy to read orange font; the zoom ring provides settings marked in green for 75 mm, 85 mm, 100 mm, 125 mm, and 150 mm. Using a 75 - 150 mm f/4.0 lens with zoom saves time because focal length can be adjusted quickly and easily without having to move the camera out of position. The Olympus Zuiko differentiates each ring with a rubberized texture, making it easy for the photographer to adjust the lens without looking away from the viewfinder. The Olympus Zuiko accepts 49 mm screw-in filters. The lens element is constructed with 15 elements in 11 groups and the aperture scale ranges from f/4.0 to f/22. A built-in, retractable lens hood on this Olympus camera lens is an added bonus and always keeps it handy.