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Thread started 01 Aug 2013 (Thursday) 17:07
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What is that irritating pattern in the blur?

 
drmaxx
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Aug 01, 2013 17:07 |  #1

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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jra
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Aug 01, 2013 17:12 |  #2

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




  
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drmaxx
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Aug 01, 2013 17:14 as a reply to  @ jra's post |  #3

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


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sandpiper
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Aug 01, 2013 17:23 as a reply to  @ drmaxx's post |  #4

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 :lol:




  
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Aug 01, 2013 17:26 |  #5

sandpiper wrote in post #16173641 (external link)
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 :lol:

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


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Aug 01, 2013 19:16 |  #6

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


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Aug 02, 2013 03:49 |  #7

I cannot see any pattern.


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Aug 02, 2013 04:03 |  #8

karobinson wrote in post #16173646 (external link)
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.


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René ­ Damkot
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Aug 02, 2013 04:18 |  #9

It's probably a combination of the pattern in the grass and the bokeh of the lens.
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armis
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Aug 02, 2013 04:20 |  #10

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.


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Kolor-Pikker
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Aug 02, 2013 04:24 |  #11

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.


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drmaxx
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Aug 02, 2013 07:09 |  #12

armis wrote in post #16174749 (external link)
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:).

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drmaxx
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Aug 02, 2013 07:11 |  #13

karobinson wrote in post #16173646 (external link)
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).


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kirkt
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Aug 02, 2013 11:10 |  #14

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.

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joeblack2022
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Aug 02, 2013 11:42 |  #15

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


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What is that irritating pattern in the blur?
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