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Is this bokeh expected?

Started Aug 23, 2014 | Discussions thread
Just another Canon shooter
Just another Canon shooter Veteran Member • Posts: 4,691
Re: Is this bokeh expected?
1

Yes.

First, the bokeh is more problematic in the "transition area" - loosely defined as right behind (or in front of) the DOF but not "too blurred". When you focus close, that area is small and you may not notice anything wrong there. Also, the blur characteristics of a lens change when you change the FL.

About the second shot - I found out, with several lenses, that the worse double line effect appears along radial lines - lines pointing from the center to the edges and to the corners. The effect worsens as you go away from the center. This is very clear in your case. On the other hand, lines or curves that are along concentric circles look well blurred. A perfect example is the lower right corner of your shot - the leg of the table looks well blurred but the edge of the round horizontal surface shows a double line.

All 35mm (and not only) lenses do this but to a different extent. I have seen this with my 35L, and I have seen quite disturbing examples with the Sigma 35. It is hard to say where the 35/2 IS stays but it seems that it has its share of bokeh problems as well.

 Just another Canon shooter's gear list:Just another Canon shooter's gear list
Canon EOS 5D Mark II Canon EF 15mm f/2.8 Fisheye Canon EF 35mm F1.4L USM Canon EF 50mm f/1.2L USM Canon EF 135mm F2L USM +4 more
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