70-200 up close

rick decker

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Whats going on with this, where does this heavy CA come from??
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
 
Where?
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
 
Maybe I should take it off before anyone sees it!
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
 
the complete upper left corner
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
 
I gave it a try but correcting was impossible. It is very evident in the corners. I don't know whats wrong here. I have a chart here from a Lens tests that says that the red and the blue channel only differ about 0.2%...
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
 
I can't see any!! Can you crop it. I rotated the image 90 deg so the upper left was the upper right. I just can't see any CA. Must be a setting on my monitor or my glasses!!!

rick
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
 
http://www.domgross.de/templates/crop.html
rick
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
 
I saturated the red. I will re-post it without the saturation. The first file was 2.7mb and the new one is 1.7. I sharpened it and did a levels.

What about now?

Thanks

Rick
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
 
I see it also...it is there on the left side ...however the upper left corner is very noticeable as Domonic pointed out....Frank
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
 
The problem is that it is not equally spreading because of the DOF it is bigger in the blurred areas and smaller in the areas that are in focus. If I correct it for the OF areas I overcorrect the IF areas. However the new version shows it less drastically. It is now only visible in the upper left and nowhere elese.
What about now?

Thanks

Rick
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
 
I re-editted it, taking out the red saturation. Take a look now. Make sure you get the new image.

rick
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
 
Can I put up a corrected one?
What about now?

Thanks

Rick
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
 
Sure be my guest...How did you correct for it? It is my undserstanding the CA is generally blue/purple fringing. I will post a crop of the area where I think you see it. I am on a different computer now.

rick
What about now?

Thanks

Rick
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
 
currently uploading it to the samples gallery:
http://www.pbase.com/sigmasd9/samples_temp

Corrected it with a PS plugin called Debarrelizer, panotools could do a better job but I am too lazy, debarrelizer is just so comfortable. In additon to that I saturated the reds and run it through a warmth filter.

Good night :)

Dominic
rick
What about now?

Thanks

Rick
Here is a close-up of a yucca flower with the 70-200f2.8. Any
comments/thought on the lens (not the picture) performance. 1/180s
200mm handheld

http://www.lightreflection.com/misc/flower01149.jpg
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
 
First, the part you cropped is the one we meant. I already saw that the there was a really high contrast on those edges but the CA the first one you posted showed was simply too much. The one in the picture with the unsaturated reds is what I would call acceptable if I consider that it was strongly lightened from behind. The performance in terms of sharpeness is good, if not very good (see how sharp the CA is rendered :) ), and the bokeh looks nice and smooth.

The PS part:

I used a plugin called debarrelizer from theimagingfactory it has the main purpose to correct barrel distortion, it also offers a function to correct CA by rescaling the blue and the red channel of the picture. Anyway I would not recommend this tool, it was just my own lazieness that made me using it. Panotools does a much better job and it is free, the problem is that you have to figure out the values for your lens once. Nothing I would/could do by guessing from this image. Once you know the values for the disortion and the CA you can use them whenever you have a picture taken with this Lens. Explanations here (panotools in general):

http://www.dpreview.com/learn/Image_Techniques/Barrel_Distortion_Correction_01.htm
and here (see "Next Step: Correcting Color Fringing I"):
http://www.caldwellphotographic.com/TutorialsDistortionAndColorFringing.html

After correcting the CA as good as possible with debarrelizer, I was not really satisfied with the result, I applied the ICC profile and some of the corrections from the action. After that I saturated the reds (as you sugested) and shifted some of the greens that occured because of the Color correction to yellow (both) with the hue/saturation tool of PS. Finally run it through a brilliance/warmth filter from nik multimedia, maybe there is a free action out there that could do the same. However this last step was not too important.

Dominic
OK..how did you know to do that or what to do. Your image for a
start has MUCH more life than mine. And what is this product and
when do you use it.

also what do you think of the job the lens did. don't foget it had
resonably strong light behind it.

Thanks

rick

--

.......Feel The Power.........Sigma.....SD9..........

http://www.lightreflection.com
http://www.silveroaksranch.com
http://www.pbase.com/rickdecker
http://www.pbase.com/sigmasd9/user_home
--
http://www.domgross.de
please don't run away because of the cheap design of the first page :)
ICQ UIN: 289647506
 

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