LR 5 lens profile not applied for JPG captures...only for RAW captures

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  • Updated 5 years ago
I use a Canon G15 camera and typically shoot in RAW+JPG. LR 5 has a lens profile for the G15, and when I check "Enable Profile Corrections" in the Lens Correction section of Develop, up pops the G15 and a lens correction is applied. All well and good.

If I select a corresponding JPG image, when I check the "Enable Profile Corrections" box LR does not auto populate the drop down items. Picking up on a hint I've read, I can choose "Canon" in the "Make" drop down, and then LR auto populates the other two drop downs, but with a G10 profile!

The lens profile I thought was to correct for distortion effects of a given lens. Surely whatever the lens does with a RAW capture it also has to do with a JPG capture, yes? So shouldn't LR use the same lens profile whether the capture is in RAW or JPG?
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camner

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Posted 5 years ago

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Denis de Gannes

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Lens profiles are file type specific. Profiles for raw files are not for already processed jpeg files.
Corrections may already been applied to the processed jpeg files.
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camner

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Thanks for the quick response.

Interesting...so you are saying that the jpg rendering that is made in-camera may change the image so that the RAW lens profile is not valid. Do I understand this correctly?

Is it also true that it would be difficult to make a jpg lens profile because the camera may make different kinds of corrections depending on the settings chosen on the camera?
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Denis de Gannes

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Yes.
With respect to the creation of lens profile for the jpegs, Adobe Labs have a lens profile creator available for download and use. I have not personally attempted to use so cannot advise on the difficulty.
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Steve Sprengel, Champion

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IF the lens-profile geometric corrections are NOT being applied in camera--I don't have a G15 so have no knowledge one way or the other--but you can test by shooting RAW+JPG and comparing the two to see if they look different with respect to geometry, then it is possible to hack a copy of the raw lens profile so that it is used for non-raw:

You can open the .lcp file in a text editor, change the tag that indicates it is for a raw file, from True to False--I don't remember the name but it is pretty obvious, and save it as a new name, without the RAW at the end of the name and then put it in your Users folder where the Lens Profile Downloader installs non-Adobe-supplied lens profiles. On my windows computer, the location is:

C:\Users\username\AppData\Roaming\Adobe\CameraRaw\LensProfiles\1.0\Downloaded\

The AppData folder is hidden so you need to either have hidden files and folders turned on or just type it into the Explorer window as you're clicking down to the path.

The locations where the Adobe-supplied lens profiles are stored for Lightroom on my Windows computer are, where you cannot save your modified profile back into these folders because it'll be ignored:

C:\Program Files\Adobe\Adobe Photoshop Lightroom
5\Resources\LensProfiles\1.0\
and

C:\Program Files (x86)\Adobe\Adobe Photoshop Lightroom 5\Resources\LensProfiles\1.0\ (for a 32-bit LR on a 64-bit system)
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camner

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@Steve Sprengel:

Thanks very much for this info! I'll look carefully first, but at my first look, the geometry between the RAW and JPGs out of the G15 is identical. I'll need to look more closely, particularly at an image where applying the lens correction to the RAW image makes for a very obvious looking difference.