Olympus M.Zuiko Digital ED 9-18mm f/4-5.6

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M.Zuiko Digital ED 9–18mm
Maker Olympus Corporation
Technical data
Type Wide angle Zoom
Focal length 9–18mm
Focal length (35mm equiv.) 18-36mm
Aperture (max/min) f/4.0-5.6 - f/22
Close focus distance 0.25m
Max. magnification 0.1
Diaphragm blades 7, circular aperture
Construction 12 elements / 8 groups
Physical
Max. length 49.5 mm
Diameter 56.5 mm
Weight 155g
Filter diameter 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.[1][2][3][4][5]

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