What is that irritating pattern in the blur?

Taken with the new 35/1.4 sigma on a 60D
(ISO125, 1/400; 1.4)
There is this very irritating pattern on the gras around the canon. I also see that in the LR version of the raw file. Is that the lens or the conversion. Any idea how I should deal with it?

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Can you be more specific? I'm not really seeing what you're talking about.

May be it's just me, but the gras forms a pattern that is irritating my eyes just by looking at it.

I think it's just the way the grass is lying in various directions. I think all you can do about it is comb the grass next time

sandpiper wrote in post #16173641
I think it's just the way the grass is lying in various directions. I think all you can do about it is comb the grass next time

ROFL I actually did that once, not with a comb but with a hand rake and my husband laughed at me..............but the picture was gorgeous..............​lol

Ann, are you talking about the "grainy" look in the grass?

I cannot see any pattern.

karobinson wrote in post #16173646
ROFL I actually did that once, not with a comb but with a hand rake and my husband laughed at me..............but the picture was gorgeous..............​lol

Doesn't everybody carry a rake in their camera bag? Right next to the leaf blower.

It's probably a combination of the pattern in the grass and the bokeh of the lens.
Some reading & links: http://www.photography​-on-the.net/forum/showthre​ad.php?t=147231

I see what he means. You'd want the blur to be uniformly smooth but there are areas of harder contrast. I think that's just how optics work. You won't get a buttery-smooth gaussian-blur-like effect on a backdrop like this.

edit: or maybe you will, actually, with another lens, if I'm reading René's link correctly.

Oh... I see it, its the very slight harshness in the bokeh, it tends to pop up every now and then on lenses in the 24-50mm range at very specific apertures and subject distances. I've used several lenses in this range over the years, and they all seem to exhibit this, just to a greater or lesser degree. You typically don't see it 95% of the time.

armis wrote in post #16174749
I see what he means. You'd want the blur to be uniformly smooth but there are areas of harder contrast.

That's exactly it. Thanks René for the link - I'll check it out later. But it seems that this is just something I need to put up with using this lens. Pitty (I am a little embarrassed to confess, but it really bugs me:oops.

Great and knowledgeable people in this forum!

karobinson wrote in post #16173646
ROFL I actually did that once, not with a comb but with a hand rake and my husband laughed at me..............but the picture was gorgeous..............​lol

It wasn't the event where people cared about combs or rakes. It was more about bikes and big guns. Not sure, if they just laughed if I would have started to comb the grass around the canon.

(By the way: This was a 140 year old model that was still in use).

Did you apply "clarity" to this image? It will emphasize the nature of the bokeh. Paint it out (apply it only to the canon) or tone it down - same for sharpening if you used a large amount or radius.

kirk

I vaguely recall some mention of "nervous bokeh" in a review of the Sigma 35/1.4.