This high-end, high-performance telephoto lens possesses a fast f2.0 aperture for shooting beautiful low light pictures or impressively capturing subjects with the background out of focus. Four (4) ED glass lenses and one (1) super ED glass lens produce superior optical clarity and contrast from one edge of the image to the other. This all-digital lens features a built-in CPU that directly communicates with the camera's software for exceptional control and accuracy, and also stands up to the elements with all-metal components and rubber seals toprotect against moisture and dust so you can use it practically anywhere. Please note: To use the Zuiko Digital 35-100mm f2.0 Zoom with the EVOLT E-300, the camera body must be upgraded to firmware version 1.3. Older versions of the firmware may have sporadic freezes with this lens.