Cornerfix Question

[photolandscape]

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I am ready to create a profile to counter the red fringing I get when using my M9 with my 25mm Zeiss lens. When I try to open the .tiff file (converted the original .DNG to a .tiff in CS5 to remove a few spots, but nothing more), the .tiff file title is "greyed out" and can't be opened by Cornerfix. Any idea how to work through this or explanation for what is going on?

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[daniel buck]

I think you can only run it on the DNG file itself?

[sandymc]

CornerFix works only on DNG files; it needs unprocessed raw data. Conversion to TIFF implicitly involves a variety of adjustments, e.g., applying a tone curve, that would make it more difficult for CornerFix to correct the image.

 

Don't worry about spots on the reference image; CornerFix is good at ignoring anything except vignetting.

 

Sandy

[photolandscape]

CornerFix works only on DNG files; it needs unprocessed raw data. Conversion to TIFF implicitly involves a variety of adjustments, e.g., applying a tone curve, that would make it more difficult for CornerFix to correct the image.

 

Don't worry about spots on the reference image; CornerFix is good at ignoring anything except vignetting.

 

Sandy

 

Thanks Sandy. I followed your good advice and tried to create a profile using the original .DNG file instead. Interestingly however, when I follow the proper steps, and start with the overexposed (2 stops) .DNG as the means for building the profile in CF, after processing, the new file looks exactly the same--red fringing in the same areas and to the same degree. When I apply it to a new image in CF, it really doesn't compensate for the red fringing whatsoever. Is this a case operator error? Also, while I am using what I think is the latest version of CF (1.4.0.3) on a Mac with Leopard, I also get a message saying that the camera model may not be compatible (M9) and my actual "mileage may vary."

 

Any suggestions on what I am experiencing?

 

Thanks.

[zeitz]

Is the red fringing you are referring to chromatic aberration? That get's fixed in Lightroom 3, not CF.

 

.tiff is not for photography. Start with .dng and save in .psd using layers for adjustments if using PS CS. This is the only way you can modify changes later. In LR 3 you don't have to save in anything as the charges are saved in a sidecar file to the .dng file.

[ho_co]

Steve--

I'm not sure I'm following what you're doing, so this may not help at all.

 

As I recall, the CF workflow is:

1) You open your white-card overexposed file.

2) You make a CF template from that.

3) You save that template.

 

Up to this point, all you've done is save a template for future use. Nothing will look different on your file. From here on, with that same lens/ISO etc:

 

4) You open CornerFix.

5) You choose the approprate CF template.

6) You open the file to correct.

7) CornerFix creates a corrected file, shows you a thumbnail, and allows you to save the corrected version.

[sandymc]

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Thanks Sandy. I followed your good advice and tried to create a profile using the original .DNG file instead. Interestingly however, when I follow the proper steps, and start with the overexposed (2 stops) .DNG as the means for building the profile in CF, after processing, the new file looks exactly the same--red fringing in the same areas and to the same degree. When I apply it to a new image in CF, it really doesn't compensate for the red fringing whatsoever. Is this a case operator error? Also, while I am using what I think is the latest version of CF (1.4.0.3) on a Mac with Leopard, I also get a message saying that the camera model may not be compatible (M9) and my actual "mileage may vary."

 

Any suggestions on what I am experiencing?

 

Thanks.

 

Firstly, check the version number in the CornerFix->About CornerFix menu item. That error messages sounds like a (much) older version of CornerFix.

 

You can get the latest version here: http://sourceforge.net/projects/cornerfix/

 

If it is V1.4.0.3, then send me the DNG file. YouSendIt.com is usually a good way - just pm me the link.

 

Regards,

 

Sandy