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Archive 2014 · strange halos (D610 and 50mm G lens)

  
 
ronno
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p.1 #1 · p.1 #1 · strange halos (D610 and 50mm G lens)


Anyone know what this is or why it occurs?
These images are shot on the D610 with 50mm 1.8G and processed with ACR/Photoshop.
(not around the suspenders on the left image, and around the arms in the right image)

https://drive.google.com/file/d/0B7qEKDuPlAGaZGMzNnNJeEVGS1k/edit?usp=sharing



Jul 22, 2014 at 05:52 PM
hijazist
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p.1 #2 · p.1 #2 · strange halos (D610 and 50mm G lens)


It happened to me a couple of times with my D600 but I never figured out what caused it.

Sorry to be of no help



Jul 22, 2014 at 06:06 PM
RLDubbya
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p.1 #3 · p.1 #3 · strange halos (D610 and 50mm G lens)


To my eye, there's a lot of green fringing of the white shirt as well. I had this issue with the 7100, easily reproducible under certain "contrasty" lighting scenarios. I attributed it to longitudinal CA.

I've seen a similar fringing with the 200/F2 now and then, on the 800e.

I wonder if the "halo" effect is also CA, or related to it?



Jul 22, 2014 at 06:13 PM
OccAeon
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p.1 #4 · p.1 #4 · strange halos (D610 and 50mm G lens)


It reminds me of the "too much chromatic aberration correction" problem from this recent post:

https://www.fredmiranda.com/forum/topic/1307563



Jul 22, 2014 at 06:14 PM
ronno
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p.1 #5 · p.1 #5 · strange halos (D610 and 50mm G lens)


OccAeon: the first thing I tried was turning the CA control completely off, and it did not help a bit.

Here is a RAW in case any of you wants to take a crack at it:
https://drive.google.com/file/d/0B7qEKDuPlAGaTHdRLUtMRkZ1UDg/edit?usp=sharing



Jul 22, 2014 at 06:31 PM
ronno
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p.1 #6 · p.1 #6 · strange halos (D610 and 50mm G lens)


I have determined that NX 2 does not show this issue, so I guess it's something within ACR...


Jul 22, 2014 at 08:10 PM
Jason_Brook
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p.1 #7 · p.1 #7 · strange halos (D610 and 50mm G lens)


OccAeon wrote:
It reminds me of the "too much chromatic aberration correction" problem from this recent post:

https://www.fredmiranda.com/forum/topic/1307563


Ironic you link to my thread cause I've seen this exact same thing as well, with magenta. It's like a gigantic outline on skin tones when my wife or daughter wear bright pink.

NEVER had the problem with my D700, but with DF it's frequent. Guessing it's the LR profile for the camera driving it.

Edited on Jul 22, 2014 at 08:38 PM · View previous versions



Jul 22, 2014 at 08:37 PM
ronno
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p.1 #8 · p.1 #8 · strange halos (D610 and 50mm G lens)


It's doesn't seem to be CA.


Edited on Jul 22, 2014 at 09:10 PM · View previous versions



Jul 22, 2014 at 08:38 PM
Jason_Brook
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p.1 #9 · p.1 #9 · strange halos (D610 and 50mm G lens)


ronno wrote:
It's not CA.


Here's my example. Once again, not CA like in my other thread.







Jul 22, 2014 at 08:42 PM
ronno
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p.1 #10 · p.1 #10 · strange halos (D610 and 50mm G lens)


Interesting Jason.
Did you see my comment above that Nikon's NX 2 software (which I pretty much hate) does not show this issue? Were you using ACR for this pink garment conversion?



Jul 22, 2014 at 08:46 PM
Jason_Brook
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p.1 #11 · p.1 #11 · strange halos (D610 and 50mm G lens)


LR5.5 which I assume is the same engine as ACR. I don't pay attention to how stuff does what


Jul 22, 2014 at 08:48 PM
ronno
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p.1 #12 · p.1 #12 · strange halos (D610 and 50mm G lens)


Yes, that uses the same engine. Hmmm...


Jul 22, 2014 at 09:02 PM
ronno
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p.1 #13 · p.1 #13 · strange halos (D610 and 50mm G lens)


OK, moving the Defringe Purple Amount slider to zero seems to alleviate the problem. (the default setting is 10.)
HOWEVER, checking or unchecking the Remove Chromatic Aberration box does nothing.
SO I guess the question is do the Defringe settings have anything to do with the Remove CA box above? And if so, why does checking or unchecking it do nothing?



Jul 22, 2014 at 09:14 PM
thoang77
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p.1 #14 · p.1 #14 · strange halos (D610 and 50mm G lens)


Just gave it a try in LR 5.4 and I dont see any of the haloing around the woman's arm as seen in the first link. I did just try moving the defringe slider beyond 0 (my default seems to be 0) and I didnt see any problems. The Remove CA checkbox seems to have an effect on the green hue, since checking and unchecking the box does make a small impact on the top right corner of the front open door (only spot I could find any CA). Doesn't make a lot of sense for the box to only affect green and not purple though.


Jul 22, 2014 at 11:13 PM
Jason_Brook
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p.1 #15 · p.1 #15 · strange halos (D610 and 50mm G lens)


ronno wrote:
OK, moving the Defringe Purple Amount slider to zero seems to alleviate the problem. (the default setting is 10.)
HOWEVER, checking or unchecking the Remove Chromatic Aberration box does nothing.
SO I guess the question is do the Defringe settings have anything to do with the Remove CA box above? And if so, why does checking or unchecking it do nothing?


In my other thread, that worked. However, for the picture I posted in this thread, that didn't work. Maybe LR hungup and it didn't render right away. I'll have to check again.

I never saw this problem with my other cameras, only the DF. ACR has to be treating the files slightly different.



Jul 23, 2014 at 06:10 AM
plubbry
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p.1 #16 · p.1 #16 · strange halos (D610 and 50mm G lens)


I've seen that grey "haloing" from time to time. For me it occurs when I use the Fringing sliders in Lightroom. It would seem the strength of the slider determines how much the saturation is reduced and how far away from an edge. The color slider simply determines the range of colors included in the 'reduce edge saturation'.

I see it occasionally when trying to reduce the green fringing around foliage. Or I have also seen it on pink skin or pink/red/purple clothes when trying to remove LOCA in front of the focal plane.



Jul 23, 2014 at 08:48 AM
williamkazak
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p.1 #17 · p.1 #17 · strange halos (D610 and 50mm G lens)


I had a round circle of green flare on a couple of pics of a guy in a black t-shirt with my 35mm F1.8 G (DX) lens and my D7000 camera.


Jul 23, 2014 at 09:57 AM





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