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

Started Apr 11, 2014 | Discussions thread
jtra Contributing Member • Posts: 855
Re: Sigma 50mm f1.4 Art and bokeh (new pics 4/11/2014)

Lenstip/Optyczne full lens review is up here:

http://www.lenstip.com/index.php?test=obiektywu&test_ob=400

jtra wrote:
According to all pictures of new Sigma 50/1.4 Art I have seen, it has a very neutral bokeh (that does no mean pleasant or smooth). That is the distribution of light in out of focus highlights is very even up to their border. No pronounced edges, but no softened edges either.

Regarding my analysis above - looking at the LensAlign target samples here:
http://www.lenstip.com/400.10-Lens_review-Sigma_A_50_mm_f_1.4_DG_HSM_Autofocus.html
and here:
http://www.lenstip.com/400.5-Lens_review-Sigma_A_50_mm_f_1.4_DG_HSM_Chromatic_and_spherical_aberration.html

It looks to me that the lens is smoother in background than in foreground, however there is something in the background bokeh does not make it perfectly smooth there (say unlike Tamron 60/2 which has edgy foreground and smooth background: http://www.lenstip.com/296.10-Lens_review-Tamron_SP_AF_60_mm_f_2.0_Di_II_LD_%28IF%29_Macro_1:1_Autofocus.html ). This seems to apply mainly for f/1.4, less so for f/2.

Still beware that generally bokeh is not constant for various focus distancees. It also often gets worse near corners.

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