Nikon Nikkor AF-S DX 18-70 mm f/3.5-4.5 IF-ED
4. Image resolution
For all focal lengths with a wide open aperture, the MTF50 values reach 35 lpmm, which is a very good score. For a 18-30 mm focal length, when stopping down the lens, the results are fabulous. For f/5.6 we reached up to 44 lpmm. The end of the range is not so fantastic, since at 50-70 mm we receive a lower resolution of 38 lpmm, which is not a bad result at all. Why do we have such a situation that the picture resolution is lower for 50-70 mm focal lengths? We will try to explain in the summary.
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The resolution at the edges of the field is not as excellent as at the center. Much better results are achieved at 18-30 mm than at 50-70 mm. These resolution results here, however, are not first-class, just average.
In summation, the Nikkor performed very well in this category. It has a very good picture resolution in the center of the frame, average on the edges of the lens with almost 4x zoom, which is a very good result at a very reasonable price.
