Nikon AF-S Micro Nikkor 60mm f/2.8G ED review at SLR Gear

 Nikon AF-S Micro Nikkor 60mm f/2.8G ED review at SLR Gear

"Compared to the predecessor Nikon 60mm ƒ/2.8, the new AF-S version of the 60mm is much sharper at all apertures. The optimum aperture for sharpness is ƒ/5.6, where the lens provides tack-sharp results across the frame, but the differences in performance for all aperture settings between ƒ/2.8 and ƒ/11 are

quite minor.

Wide open at ƒ/2.8, the lens exhibits excellent central sharpness, with traces of corner softness (2 blur units). This corner softness goes away by ƒ/4, and as mentioned, by ƒ/5.6 it's as sharp as sharp gets. Technically, diffraction limiting begins to set in by ƒ/8, but your eyes won't notice it until ƒ/22, where a generalized softness is present in images produced with that aperture (just over 2 blur units). It's possible to stop down to ƒ/32 (or greater, depending on your focus distance), but here you'll get even more softness in your images (4+ blur units).
 
On the full-frame D3, the 60mm doesn't achieve the tack-sharp quality we saw on the D200, but the results are still very impressive - about 1.5 blur units. The performance trend is the same - your sharpest results will be obtained at ƒ/5.6 - but you'd be hard-pressed to notice a difference between ƒ/5.6 and ƒ/4 or ƒ/8, or even ƒ/2.8.
 
Curiously, there are some slight differences between the 60mm ƒ/2.8 AF-S performance on the sub-frame D200 and the full-frame D3. At ƒ/2.8, there is no noticeable corner softening, and at ƒ/32, the lens doesn't exhibit the significant generalized softness we saw on the D200; the sharpness is still not as good as seen at larger apertures, but it's not as bad as found on the D200 (3 blur units instead of 4+)."
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