Camera Raw/Lightroom: Lens Profile Requests and Information?

The problem is that these lenses have no way of recording the tilt-shift settings in EXIF data. It is impossible to determine what if any tilt and/or shift setting was used for a specific image. It is possible to create a single lens profile that will work with the tilt and shift settings all at 0, but then you would have to manually record what images were shot with no tilt or shift. Fortunately these TS-E lenses all have relatively low distortion and vignetting at zero tilt and shift settings. See this similar post for some suggestions:

https://feedback.photoshop.com/photoshop_family/topics/please_add_lens_profiles_for_tilt_shift_lens

You'll need to build your own profile for this lens. IMHO it doesn't need one. 

The Mavic may already have a lens profile built into the raw DNG format. In Lightroom, you can confirm this by looking for the presence of an Info (i) icon on the lower portion of the lens correction panel. If it is there, clicking on it will inform which aberrations are being automatically corrected.

Thanks for the hint. But there is only the message what I try to activate the correction, that a matching profile can't be found.

Thank you for confirming. Would you be able to upload a sample DNG file from the Mavic Air and provide a download link?

I created a profile myself.
There is obviously not much to correct. Here is the link to it: https://drive.google.com/file/d/1ugkO2R7hNoNLYcq4LdUwrhXX337Eiru5/view?usp=sharing

What I don't understand: I can apply it for DNG files but not for JPGs in Lightroom?!? Is it because I created the profile with DNG files?

Hi,

Thank you for sharing the profile you created.

I located some external sample DNGs from the Mavic Air which includes a built-in WarpRectilinear opcode for correcting distortion and a GainMap for vignette correction. Your images should also include the opcodes unless there is a way to disable lens corrections in the camera (I'm not sure).

The screen capture below is of the "info" indicator I mentioned previously. This is from Adobe Camera Raw, but an equivalent version of Lightroom should display the same information on the Lens Correction panel.



External lens profiles such as the one you created work on either raw or JPEG images, but not both. JPEGs are output referred and are usually corrected for lens aberrations in-camera, so they typically do not require a lens correction profile.

That said, if you make a copy of your existing profile and change the value of the following element (all instances of it) from True to False, it will become available to apply on JPEGs.

<stCamera:CameraRawProfile>True</stCamera:CameraRawProfile>

                                               - change to -

<stCamera:CameraRawProfile>False</stCamera:CameraRawProfile>

The results may not be ideal given that the DNG is a scene referred image and that is likely what you used to create the profile. You can also reshoot your calibration targets in JPEG mode to generate a JPEG-specific profile that way.

Hope that helps.

Regards,

- Chris

Thanks for the explanation Chris. 

There is not option to disable it in the camera/drone. 

Now I see, that the embedded profile is used in Photoshop. My Lightroom installation was broken, so that might be the reason why it was not using and showing the integrated profile. 

When I had created the profile myself, I was surprised because there is nearly no change to the 'normal' DNG, which I had never seen before.

Where do I make these setting for Lightroom to apply the profile for JPGs? 

Thanks
Claus

Hi Claus,

The profiles (raw and JPEG versions) can be copied to the same LensProfiles/1.0 location in your user folder where Lightroom, Camera Raw and Photoshop will all read from.

I'm not sure which version of Lightroom you have, but there was a brief period when we first added the "info" indicator to Camera Raw that it had not made it to Lightroom for a version or 2 later. That could be the difference you see.

Regards,

- Chris