*SPECIAL ORDER* High performance, large aperture medium telephoto macro lens with OS (Optical Stabilizer).SLD glass provides good control of aberration and the floating inner focus system ensures high rendering throughout the focusing range. HSM ensures a quiet and high speed AF as well as full-time manual focus override. This lens has a rounded 9 blades diaphragm which creates an attractive blur to the out of focus areas. This medium telephoto macro lens allows you to maintain an appropriate distance from subjects while still getting close up photos. Since the working distance at its closest focusing position is 142mm, shadows of the lens and camera will not affect photography making it suitable for taking photos of subjects, such as flowers, under natural lighting conditions.