Olympus ZUIKO DIGITAL ED 7-14mm 1:4.0 review

Olympus ZD 7-14mm 1:4:0 geometry comparison (shortest focal length)


Olympus ZD 7-14mm results continued…

Outdoor / Resolution / Corner sharpness / Fringe and macro / Geometry / Vignetting

To measure geometric distortion we photographed a chart consisting of a grid pattern with perfectly straight lines. The lenses were tested at their widest focal lengths with an aperture of f8. The images were analysed with Imatest using 5th Order line calculation and the full areas presented here at a reduced resolution.

An excellent result for the 7-14mm lens here, which exhibits minimal distortion when zoomed-out. This is particularly impressive given the extreme wide angle nature of the lens at this focal length. Indeed it shows less geometric distortion than most DSLR kit lenses, along with Canon’s 17-40mm L.

Olympus ZUIKO DIGITAL ED 7-14mm 1:4.0
Olympus ZUIKO DIGITAL ED 14-42mm 1:3.5-5.6
Olympus ZUIKO DIGITAL 14-45mm 1:3.5-5.6
7-14mm at 7mm f8
Distortion: 2.34% barrel
  14-42mm at 14mm f8
Distortion: 2.97% barrel
  14-45mm at 14mm f8
Distortion: 3.28% barrel


Olympus ZD 7-14mm 1:4:0 geometry comparison (longest focal length)

To measure geometric distortion we photographed a chart consisting of a grid pattern with perfectly straight lines. The lenses were tested at their longest focal lengths with an aperture of f8. The images were analysed with Imatest using 5th Order line calculation and the full areas presented here at a reduced resolution.

Zoomed-in, the 7-14mm again exhibits minimal geometric distortion, and considerably less than either of the kit lenses at the same 14mm focal length (see results above). The 7-14mm performs very well in this test.

Olympus ZUIKO DIGITAL ED 7-14mm 1:4.0
Olympus ZUIKO DIGITAL ED 14-42mm 1:3.5-5.6
Olympus ZUIKO DIGITAL 14-45mm 1:3.5-5.6
7-14mm at 14mm f8
Distortion: 0.138% pincushion
  14-42mm at 42mm f8
Distortion: 0.21% barrel
  14-45mm at 45mm f8
Distortion: 0.48% barrel
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