Bokeh comparison between Sigma, Otus and Nikkor 58mm

Started Apr 19, 2014 | Discussions thread
HSway Veteran Member • Posts: 3,149
Re: OOF blur?

_sem_ wrote:

Dibyendu Majumdar wrote:


What do you guys think of below? Note that these are taken from and are actually meant to show longitudinal chromatic aberration.

I think that the Nikkor's rendition of background is particularly interesting.

Many comments on the nominal fuzziness, but not so much on the OOF blur. Both 10s on the scale (foreground and background) look less blurred with the 58mm than with the other two.

This is from Sato:

"Nikon calls a photographic lens that is superior for natural depth reproduction of three-dimensional subjects "a threedimensionally high-fidelity lens". To realize this, we are making every effort not only to improve resolution and contrast at the focused plane, but also to enhance depth reproduction utilizing natural transition of bokeh from a sharply focused point, to a slightly blurred point, then a fully blurred point.
Conventionally, photographic lenses, that confine subjects with depth into two-dimensional images, have been evaluated mainly with MTF, resolution or contrast. It is very easy to compare these factors at the focused points. We admit that the performance of lenses has greatly evolved by improving these factors. However, Nikon has long doubted whether that is enough. Should we evaluate the reproduction of three-dimensional subjects as they are, even in the form of two-dimensional images?

To reproduce the depth of subjects more naturally in images, rather than evaluating resolution and degree of bokeh for the individual plane of the foreground, focused plane and background, it is necessary to evaluate the consecutive transition from blurred, focused to blurred plane. Although it is impossible to achieve extremely intensive evaluation, we thought we could improve lenses by minutely investigating consecutive transition. In consideration of this idea, we suppress resolution at a short distance within an appropriate level, and adjust the balance among lens aberrations moderately to prevent a drastic change of bokeh. As a result, we realize original lens characteristics that provide natural depth reproduction in which the degree of bokeh moderately changes as the distance from the sharply focused point increases."

It makes sense. And you can see it.

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