The Vivitar 28 mm lens is compatible with Olympus DSLR cameras. This Vivitar lens includes several features that allow photographers to shoot in poor lighting conditions. The focal length size is 28 mm and the aperture measurement is f/2.8. A few benefits of using this 28 mm f/2.8 lens by Vivitar includes sharp optics, a hight contrast, and excellent visibility. This camera lens comes equipped with six aperture blades and operates efficiently. Colored marks on the Vivitar 28 mm lens help photographers estimate the plane of view. The largest reproduction ratio is one to five when being used at 23 cm of focusing distance. Other notable features of the Vivitar 28 mm lens are the ability to capture a wide number of subjects in one shot and an extensive depth of field. The Vivitar lens has a wide-angle that can be used in small spaces. Vivitar's 28 mm f/2.8 lens can make images appear softer and produce sharper images than other lens systems. It is well suited for those who often produce portraits.