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Nikon AF-S 50mm f/1.4G

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Sagittal Coma Flare

The following claim is presented on Nikon’s global web site:

Newly developed optical system effectively corrects sagittal coma flare and coma aberration.

The crops presented below shows the claim to be at odds with reality. The Reindeer Bokeh page is dedicated to this subject, as well as the crops below. This doesn’t mean that the 50/1.4G is necessarily worse than other 50mm lenses, but Nikon’s claim is just strange given the evidence.

The crops below show what to expect with a variety of 50mm lenses at f/1.4. Even with Live View, all were extremely difficult to focus off-center (which is where sagittal coma flare occurs) and so perfect focus matching could not be achieved. However, the overall behavior is clear.

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Nikon 50/1.4G

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