| M.Zuiko Digital ED 9–18mm | |
| Maker: | Olympus Corporation |
| Type: | Wide angle Zoom |
| Flength: | 9–18mm |
| Flength-Eq: | 18-36mm |
| Aperture: | f/4.0-5.6 - f/22 |
| Groups: | 8 |
| Elements: | 12 |
| Diaphragm: | 7, circular aperture |
| Close-Dist: | 0.25m |
| Max-Mag: | 0.1 |
| Weight: | 155g |
| Max-Diameter: | 56.5 mm |
| Max-Length: | 49.5 mm |
| Filter: | Ø52mm |
The Olympus Corporation M.Zuiko Digital ED 9–18mm f/4-5.6 is a Micro Four Thirds System lens. In the Micro Four Thirds format, it is a zoom ranging from wide to ultra-wide. Like many other Olympus Micro Four Thirds zooms, the front lens elements extend for use, and retract for storage.
The lens is "focus-by-wire"; the grip ring is not mechanically connected to the optics, but instead controls the autofocus motor. Users can reverse the ring focusing direction in the camera software.[1]
Reviewers found sharpness to be competitive with the alternative Panasonic 7-14mm, despite a noticeably smaller collapsed size, lack of vignetting, and much lower price. However, they also note more chromatic aberration, and lower build quality.[2] [3] [4] [5]