Sigma 50mm f1.4 Art and bokeh (new pics 4/11/2014)

Started Apr 11, 2014 | Discussions thread
(unknown member) Senior Member • Posts: 1,144
Re: Sigma 50mm f1.4 Art vs Zeiss Otus 55 Bokeh

I'm not surprised that the bokeh is better than the Nikon G lenses although the magnitude of the differences is surprising.

But the new Sigma is being compared to the Zeiss so what do you think of this comparison?

Sigma 1.4

Sigma Red Mailbox Shot

Zeiss Otus 1.4

Zeiss Red Mailbox Shot

or this comparison?

Sigma 2.0

Sigma park sculpture

Zeiss Otus 2.8

Zeiss park sculpture

Also, what is the significance of the bokeh being smoother near the center of the shot compared to edges? I guess it means that I could crop for better results, but I'd like to know what you see as the implication of the the non-uniform smoothness of background blur.

Thanks!

jtra wrote:

TQGroup wrote:
Hi Jtra

I have read your article previously and have recommended it to friends, so now is a good time to thank you for sharing your important work.

Thank you.

As to the Sigma 50 F1.4 ART, I am not so sure that I could call its bokeh "neutral". Of course, as I've said before, it is very early days and I want to see test photos from sites I know and trust before I can confirm a definite opinion.

For example, please consider the 100% crop from a Lens Tip photo posted above in this forum: (easy link) http://www.dpreview.com/forums/post/53483220 and let me know how you would describe the bokeh highlights of the black motor car.

I am interested in your "expert" evaluation.

I based my opinion on pictures I have seen here:
http://lcap.tistory.com/entry/Sigma-50mm-f14-dg-hsm-Art-Review

Bokeh of any lens can look bad when picture is too sharpened (in camera sharpnening or raw processing can do it).

Looking at the picture you talk about (http://pliki.optyczne.pl/sig50A/sig50_fot14.JPG ), I see that bokeh is smoother near center and more edgy on image sides. You can see that on windows. Look at the windows just above statue. They are quite smooth but as you follow them to the left side, the edge of bokeh is more and more prominent. This is quite common. Older Sigma 50/1.4 DG HSM also has smoother background bokeh in about DX area than at sides.

Anyway this looks ok to me:
http://pliki.optyczne.pl/sig50A/sig50_fot07.JPG

And it is way better than Nikon 50/1.4G here:
http://pliki.optyczne.pl/nik50afs/nik50_fot11.jpg
And this is Nikon 50/1.8G:
http://pliki.optyczne.pl/nik1.8-50G_pz/DSC_3113.JPG

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