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Nikkor AF-S DX 18-55mm f/3.5-5.6G VR - Review / Test Report - Analysis |
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Lens Reviews -
Nikon / Nikkor (APS-C)
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Page 2 of 3
Distortion
The AF-S 18-55 VR shows quite typical distortion characteristics for a lens in this class. At 18mm there is very pronounced barrel distortion which is reduced to a moderate amount at 24 mm. At 35mm and 55mm the lens is basically free of distortion.
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Move the mouse cursor over the focal length text marks below to observe the respective distortion
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| 18mm |
24mm |
35mm |
55mm |
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The chart above has a real-world size of about 120x80cm.
Vignetting
Vignetting is well under control. Wide open at any focal length, the lens shows light falloff towards the corners that can be visible and maybe disturbing, but stopping down just 1 stop reduces vignetting to a level that is hardly field-relevant anymore.
MTF (resolution)
Despite their cheap price and low build quality, kit lenses often show surprisingly high resolution. The AF-S 18-55 VR is no exception to this rule. The center resolution is generally excellent at focal lengths from 18 to 35mm and apertures wide open down to f/8. At f/11 diffraction starts to reuce resolution again. At 50 mm the lens is a bit softer in the image center, achieving "only" very good resolution.
Borders and corners delivery significantly lower resolution, especially wide open. The lens needs to be stopped down to reach good to very good sharpness here.
Please note that the MTF results are not directly comparable across the different systems!
Below is a simplified summary of the formal findings. The chart shows line widths per picture height (LW/PH) which can be taken as a measure for sharpness.
If you want to know more about the MTF50 figures you may check out the corresponding Imatest Explanations
Chromatic Aberrations (CAs)
Just like vignetting, CAs (color shadows at harsh contrast transitions) are comparably well under control for a lens in this class. With values up to 1.6 pixels at the image borders they can be visible and disturbing at the lower focal lengths, at 35mm and 55mm however CAs are hardly field-relevant.
Note that CAs can easily be corrected in software or by the camera itself (most modern Nikon DSLRs remove CAs themselves if you shoot JPGs).
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