Skip navigation
This discussion is archived
Currently Being Moderated

Lens Correction problem - double vignetting?

May 28, 2010 8:38 AM

On some but not all of older images, with xmp's deleted and all caches cleared, I end up with a over vignette effect, as shown below.  Haven't been able to correlate it with other than images previously processed in 2003 then 2010.  The .nef file date did not change.  And before somebody asks the manual controls were all at neutral.  D300 and 16-85VR lens with downloaded profile.

 

Richard Southworth

 

DoubleVig.jpg

 
Replies
  • Currently Being Moderated
    May 28, 2010 11:01 AM   in reply to RASouthworth

    Are there any adjustments made in the FX panel?

     
    |
    Mark as:
  • John_Cornicello_home
    787 posts
    Mar 31, 2003
    Currently Being Moderated
    May 28, 2010 11:42 AM   in reply to RASouthworth

    I'm on an old machine at the moment, and don't have CS5 installed, but the file opened and looked fine (no light vignetting) in Lightroom 2.7.

     
    |
    Mark as:
  • John_Cornicello_home
    787 posts
    Mar 31, 2003
    Currently Being Moderated
    May 28, 2010 11:50 AM   in reply to RASouthworth

    No, it does not. It was just the only thing I had available to open the file with. Hoping others can jump in with some ideas.

     
    |
    Mark as:
  • Currently Being Moderated
    May 28, 2010 2:57 PM   in reply to John_Cornicello_home

    It may be due to an erroneous profile, or perhaps a double profiling by the profiler.

     

    If you have access to DXO Pro, run it there and compare.

     

    Is there any there any possibility the file has been run through a vignetting correction? Because of all the possible tripping up, when I use DXO, I have a second set of RAW files reserved apart from the ones obtained by using Bridge to upload. DXO has comments about this, and so far as that is concerned, Nik software does also. Unfortunately, this results is some rather huge demands on storage.

     

    I have run both the Bridge upload and the independent upload through ACR and so long as non of the image correction processes are employed, just the lens corrections, I found no problems. Still, on important shoots, I do both then edit out the ones for which I have to have excellent geometric corrections. Cloud photos, who cares.

     
    |
    Mark as:
  • Currently Being Moderated
    May 29, 2010 8:58 AM   in reply to RASouthworth

    It also looks like your camera was not positioned  normal  to the wall and level.

     

    It also appears to have residual barrel distortion, but without the correct placement, one can't be sure. I have seen brick walls that have sagged as well.

     

    None of this would affect vignetting, however.

     
    |
    Mark as:
  • Currently Being Moderated
    May 29, 2010 9:02 AM   in reply to RASouthworth

    I've just done a brick wall test with my 16-85mm at 42mm and f/4.8. This is what I get with the D300/16-85mm profile:

     

    _KN20545.jpg

     
    |
    Mark as:
  • Currently Being Moderated
    May 29, 2010 9:16 AM   in reply to RASouthworth

    This is what I get using the profile:

     

    S10_5685.jpg

     

    Maybe there's something wrong with your copy of the downloaded profile?

    BTW, mine is called "Nikon D300 - Nikon AF-S DX NIKKOR 16-85mm f/3.5-5.6G ED VR"

     
    |
    Mark as:
  • Currently Being Moderated
    May 29, 2010 10:11 AM   in reply to RASouthworth

    How's this?

    All settings at default, except Lens Correction, set as shown.

     

    Untitled-1.jpg

     
    |
    Mark as:
  • Currently Being Moderated
    May 29, 2010 12:40 PM   in reply to RASouthworth

    What does it look like with Camera Raw defaults?


     
    |
    Mark as:
  • Currently Being Moderated
    May 29, 2010 12:45 PM   in reply to RASouthworth

    I'm not sure if it's related, but I'm also experiencing something weird in another raw image. It has develop settings and a tilted crop applied, with the symbols on the corner of the thumbnail in Bridge. When I create a JPEG from it in the same folder, it also gets the thumbnail symbols. If I clear develop settings on both images they look like the originals. If I delete the XMP file, they both acquire the settings and icons again!

     

    I can't work out where it's coming from. I'm wondering if there's settings coming from somewhere else, as I didn't think you could store settings in a NEF file.

     
    |
    Mark as:
  • Currently Being Moderated
    May 29, 2010 1:02 PM   in reply to RASouthworth

    Please help me grasp this, Richard:

     

    What in this image made you want to apply lens correction to it?  I opened it in ACR 5.7 with no lens correction whatsoever and I can find no lens distortion anywhere in it.  See screen shot below.

     

    Or is the issue that ACR 6.x is applying the correction by default?  I don't have CS5 as it does not run on my PPC machine, so I can't test ACR 6.x.

     

     

    A_NEFsample.jpg

     

     

    Thanks in advance.

    Wo Tai Lao Le
    我太老了
     
    |
    Mark as:
  • Currently Being Moderated
    May 29, 2010 1:34 PM   in reply to RASouthworth

    Ah!  Thanks for the explanation.  Makes perfect sense to me now.

     

    Wo Tai Lao Le

    我太老了

     
    |
    Mark as:
  • Currently Being Moderated
    May 29, 2010 1:38 PM   in reply to RASouthworth

    This is what the ACR screen looks like with no adjustments:

     

    Untitled-0.jpg

    You can compare this directly with the one in my post 13 above.

     
    |
    Mark as:
  • Currently Being Moderated
    May 31, 2010 8:09 PM   in reply to Yammer

    I posted a response over in the ALPC forum.

     
    |
    Mark as:
  • John_Cornicello_home
    787 posts
    Mar 31, 2003
    Currently Being Moderated
    May 31, 2010 8:50 PM   in reply to MadManChan2000

    Here's a link to the other discussion: http://forums.adobe.com/thread/648808?tstart=0

     
    |
    Mark as:
  • Currently Being Moderated
    Jun 1, 2010 12:19 AM   in reply to MadManChan2000

    MadManChan2000 wrote:

     

    I posted a response over in the ALPC forum.

     

     

    John Cornicello has already elucidated by posting the link, thank you, but for those who may be as puzzled as I was "ALPC" forums stands for Adobe Labs Profile Creator forum.

     
    |
    Mark as:

More Like This

  • Retrieving data ...

Bookmarked By (0)

Answers + Points = Status

  • 10 points awarded for Correct Answers
  • 5 points awarded for Helpful Answers
  • 10,000+ points
  • 1,001-10,000 points
  • 501-1,000 points
  • 5-500 points