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Author Topic: Built-in lens profiles?  (Read 1493 times)

Redcrown

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Built-in lens profiles?
« on: October 17, 2021, 01:28:25 am »

I was fishing through some old raw files when I noticed something strange. Some of my raw files from a Canon 5D3 and Canon 5D4 show a "Built-in lens profile applied" in ACR (13.4 on Windows). This for both the Canon 24-105 and 70-200 lenses.

To the best of my knowledge these camera/lens combos have never had a built-in lens profiles. And strangely, the message appears on many, but not all images. It also appears it is a false message. If I tick the "Use profile corrections" option on and off, the image preview changes according to what I believe is the external lens profiles. I also have raw images from Canon EOSR with the same lenses, and I can't find any showing a built-in lens profile.
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digitaldog

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Re: Built-in lens profiles?
« Reply #1 on: October 17, 2021, 11:08:50 am »

It will only appear on raws (not JPEGs from the camera) for one. On the one camera I have that shows Built-In lens profiles, that's it; I have no further options.
You might consider uploading a raw for us to look at with various versions/OSs of ACR and Lightroom Classic .
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Redcrown

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Re: Built-in lens profiles?
« Reply #2 on: October 18, 2021, 01:22:25 am »

Here are 2 raw files, same camera+lens, shot 4 seconds apart. One with a built-in profile, one without, only difference is focal length.

https://www.dropbox.com/s/ilc2eepya0niiqu/NoProfile.dng?dl=0
https://www.dropbox.com/s/woilr040tfi8ofu/BuiltinProfile.dng?dl=0
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fdisilvestro

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Re: Built-in lens profiles?
« Reply #3 on: October 18, 2021, 03:05:14 am »

Does it happens with the original .cr2 files or only with the DNGs?

Redcrown

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Re: Built-in lens profiles?
« Reply #4 on: October 18, 2021, 11:33:25 am »

I find instances on CR2, CR3, DNG, and Lossy DNG files. But I'm convinced it's a bug of some sort and a false positive. I'm not a Lightroom fan, but I tested it and found the same. If ACR reports a built-in profile, so does LR.
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digitaldog

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Re: Built-in lens profiles?
« Reply #5 on: October 18, 2021, 01:08:35 pm »

I find instances on CR2, CR3, DNG, and Lossy DNG files. But I'm convinced it's a bug of some sort and a false positive. I'm not a Lightroom fan, but I tested it and found the same. If ACR reports a built-in profile, so does LR.
It seems like a bug at least in terms of what is shown here. The results kind of appear the same (on or off). I'm not sure why such a message is shown with one but not the other while the actual profile is the same in both.
I can officially bug it (since I'm testing on a beta too and it still behaves the same), but if Adobe asks for the images, I'd need to know if that's OK with you.
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Redcrown

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Re: Built-in lens profiles?
« Reply #6 on: October 19, 2021, 11:26:49 am »

digitaldog, please hold off on using the raw images I posted. I'll look for a different non-person image and get back to you. I don't remember who that girl is and have no way to get permission.
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digitaldog

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Re: Built-in lens profiles?
« Reply #7 on: October 19, 2021, 11:58:46 am »

digitaldog, please hold off on using the raw images I posted. I'll look for a different non-person image and get back to you. I don't remember who that girl is and have no way to get permission.
Sounds good.
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