DA 18-55mm WR lens detection problem (jpg only)

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  • Updated 5 years ago
Lightroom is not detecting my lens type on jpg photos taken with my Pentax DA 18-55mm WR lens. It does detect the lens when shooting raw. The camera is a Pentax K-30 firmware version 1.04.
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Scott Eichhorn

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Posted 5 years ago

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Photo of Rikk Flohr

Rikk Flohr, Champion

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No one has created a profile for it yet. Profiles are file type specific - meaning that a profile for a JPEG cannot automatically be applied to a Raw and vice-versa.

You can download the Adobe Lens Profile tool and create your own.

It is possible to hack the existing profile to become a Raw profile but it isn't quite as good as creating a quality profile from a series of Raw captures;.
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Steve Sprengel, Champion

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JPGs from the camera may already have some lens-corrections applied, so LR cannot assume the raw profile would match the corrections needed for JPGs.

If I was sure the geometric and vignetting lens-corrections from the RAW profile also needed to be applied to JPGs then I would find the lens-corrections data file (.lcp file) in the following location on my Windows computer:

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

Then I would make a copy and put it over in my non-Adobe-supplied profiles folder, here:
C:\Users\MyUserName\AppData\Roaming\Adobe\CameraRaw\LensProfiles\1.0\Downloaded\

Then I would edit that copy of the .lcp file in a text editor and change the line that says CameraRawProfile="True" to "False" and save it, then rename it to remove the RAW from the end of the filename.
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Scott Eichhorn

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Those changes allow me to manually assign a lens correction, but the metadata still shows it as unknown. I found a thread that suggests the k-30 has changed the lens Exif code format from earlier models like the k-5.

http://www.pentaxforums.com/forums/ge...

Is it possible I just need to wait for Adobe to update the Exif library to account for these changes?