The Olympus M.Zuiko Digital ED 9-18mm f/4-5.6 is an ultra-compact wide-angle zoom lens designed for Micro Four Thirds mirrorless cameras, delivering an effective focal length of 18-36mm in 35mm terms. This lightweight lens weighs just 155 grams and features a retractable design that collapses for easy portability, making it ideal for travel and landscape photography. The advanced optical design includes dual super aspherical (DSA) lens elements, an ED glass element, and aspherical surfaces that control distortion and aberration while maintaining sharpness across the zoom range. With a 100-degree maximum angle of view at 9mm and internal autofocus that operates silently and smoothly, this versatile lens excels in both photo and video work. The 52mm filter diameter and 0.25m minimum focus distance provide flexibility for creative shooting.