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Sony SAL-1118 DT 11-18mm f4.5-5.6 lens review Gordon Laing, September 2007

More results :
Outdoor / Resolution / Corner sharpness / Fringe and macro / Geometry / Vignetting

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Sony DT 11-18mm vs DT 18-70mm corner sharpness

  To compare the corner sharpness of the Sony DT 11-18mm against the DT 18-70mm, we photographed the Enhanced Digital Camera Resolution Chart with each lens at their shortest and longest focal lengths and various apertures in Aperture Priority mode using a Sony A100 body.

The A100 was set to its best quality JPEG and default image tone and sharpening settings, and anti-shake was turned off. The crops are taken from the extreme lower left corner of the chart and presented here at 100%.

Despite the differences in focal range, both lenses actually exhibit similar optical artefacts in the corners when zoomed all the way in or out. At its widest focal length, the DT 11-18mm exhibits noticeable softening in the corners at larger apertures and only gets this under control when stopped down quite significantly. Zoomed-into 18mm though, the DT 11-18mm delivers a far superior result, with only slight softening in the corners at the maximum aperture and a good result as you stop it down.

While it's interesting to compare the similarities between each lens zoomed-out and zoomed-in, the really important comparison is when both lenses are set to 18mm. In this instance the DT 11-18mm delivers a far superior result, so once again if you own both lenses and are shooting at 18mm, use the ultra wide lens in favour of the kit zoom. Our next results page tests the Sony DT 11-18mm fringing and macro performance.


Corner sharpness, shortest focal length

Sony DT 11-18mm at 11mm using Sony Alpha A100
Sony DT 11-18mm at 11mm f4.5
Sony DT 11-18mm at 11mm f5.6
Sony DT 11-18mm at 11mm f8
Sony DT 11-18mm at 11mm f11
11-18mm at 11mm f4.5
11-18mm at 11mm f5.6
11-18mm at 11mm f8
11-18mm at 11mm f16

Sony DT 18-70mm at 18mm using Sony Alpha A100
Sony 18-70mm at 18mm f3.5
Sony 18-70mm at 18mm f8
Sony 18-70mm at 18mm f16
18-70mm at 18mm f3.5
18-70mm at 18mm f5.6
18-70mm at 18mm f8
18-70mm at 18mm f16


Corner sharpness, longest focal length

Sony DT 11-18mm at 18mm using Sony Alpha A100
Sony DT 11-18mm at 18mm f5.6
Sony DT 11-18mm at 18mm f8
Sony DT 11-18mm at 18mm f11
Sony DT 11-18mm at 18mm f16
11-18mm at 18mm f5.6
11-18mm at 18mm f8
11-18mm at 18mm f11
11-18mm at 18mm f16

Sony DT 18-70mm at 70mm using Sony Alpha A100
Sony 18-70mm at 70mm f5.6
Sony 18-70mm at 70mm f8
Sony 18-70mm at 70mm f11
Sony 18-70mm at 70mm f16
18-70mm at 70mm f5.6
18-70mm at 70mm f8
18-70mm at 70mm f11
18-70mm at 70mm f16

Sony DT 11-18mm lens results continued...

Outdoor / Resolution / Corner sharpness / Fringe and macro / Geometry / Vignetting
All words, images, videos and layout, copyright 2005-2014 Gordon Laing. May not be used without permission.

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