Nikon Nikkor AF-S 24-70 mm f/2.8G ED
7. Coma and astigmatism
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Coma makes itself felt quite significantly in the case of the tested lens. In the corner of the APS-C/DX sensor its influence is still slight but in the full frame corner it is already very pronounced. You can also notice that the level of coma decreases with the increase of the focal length.
The average value of astigmatism amounted to 5.6%. Such a result is on the borderline of good and very good level so there are no reasons to complain here. You can mention only the fact that in our measurements we noticed an increasing tendency – from 3.5% at the shortest focal length to near 7% at longer focal lengths. It might be partially the cause of a worse performance on the edge of the frame at the longest focal lengths and wide open.
