Nikon Nikkor AF-S DX 12-24 mm f/4G IF-ED
7. Coma and astigmatism
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Coma in the Nikkor is visible at every focal length. Its level is perhaps not huge but it can certainly be seen. Here the Nikkor fares worse than the Tokina, which, especially at shorter focal lengths, performed distinctly better.
The advantage of the Tokina is also evident when it comes to the astigmatism correction. An average difference between horizontal and vertical MTF50 values amounted to 6.6%; in the case of the Nikkor it was 8.3%.
