ACR8.1 Lens Correction tab

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  • Updated 5 years ago
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I'm using ACR8.1 on Win7 64bit. I have ACR set up for defaults for camera serial number and ISO setting. I use Canon cameras and lenses only. I had made defaults but now see the Lens Correction tab is not finding the correct lens. It only sees what lens I had when making the defaults. If I choose Setup - Auto the the Make, Model, and Profile are empty. Once I choose Canon under the Make it finds the correct lens. Of course that changes Setup to Custom. If I choose the Save New Lens Profile Defaults then it always chooses that lens regardless of what lens I shot with. Shouldn't Auto select the correct Canon lens?

Thanks for any help.
Dennis
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Dennis Thompson

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Posted 5 years ago

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Eric Chan, Camera Raw Engineer

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Which lens are you using?
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Dennis Thompson

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Eric, I use the following lenses:

Canon ef-s 10-22 f3.5-4.5
Canon ef 24-70 f2.8 L Mk I
Canon ef 70-200 f2.8 L Mk I
Canon ef 85 f1.8
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Eric Chan, Camera Raw Engineer

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Hi Dennis, this sounds very strange. The "Save New Lens Profile Defaults" option is intended to save the metadata associated with a particular lens (such as your EF 85 f/1.8) and associated it with your chosen lens profile. That way when you process images taken with that lens in the future, you don't have to keep manually picking the same lens profile over and over.

Some more questions for you:

1. Are you shooting raw files?

2. What is your camera model?
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Dennis Thompson

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1 - I shoot 100% RAW.

2 - I use a Canon 20D and Canon 5D.

It seems to work if I only have "Make defaults specific to camera serial number" in the Camera RAW Preferences. It's when I also check the "Make defaults specific to camera ISO setting" that it has the problem.

Any ideals?
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Dennis Thompson

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1 - I shoot 100% RAW.

2 - I use a Canon 20D and Canon 5D.

It seems to work if I only have "Make defaults specific to camera serial number" in the Camera RAW Preferences. It's when I also check the "Make defaults specific to camera ISO setting" that it has the problem.
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Dennis Thompson

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Eric - if I try to use defaults specific to ISO, then it will only find the last lens I used when I chose save lens in the custom setup.
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Eric Chan, Camera Raw Engineer

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Hi Dennis,

You may be (probably are) already aware of the following background information, but I'll provide in anyways so that we have a better context for pinning down the issue.

There are two different types of defaults in Camera Raw: camera defaults and lens defaults.

Camera defaults are for all the normal adjustments, including whether lens profile corrections are turned on or off. As you know, camera defaults can also be specific to a camera serial number, as well as to ISO. However, camera defaults do not store any information regarding lens model metadata lens profile associations.

Lens defaults are for associating lens model metadata (i.e., which lens was used to take the picture?) with lens profiles. These are completely separate from camera defaults. Usually, setting up custom lens defaults isn't necessary because Camera Raw can find the correct lens profile automatically. However, the lens defaults are useful in three scenarios: (1) if you have built your own profile and wish to use that instead of the Adobe-provided one, (2) with older cameras such as the Canon 20D which record incomplete lens model metadata about, and/or (3) with third-party lenses which also record incomplete lens model metadata.

Using lens defaults shouldn't be necessary with your 5D when using Canon lenses, because it was one of the first Canon models to begin recording complete lens model identification metadata in its raw files. Nonetheless, if you wanted to set up a custom lens default (e.g., for reasons #1 or #3) it should still work correctly, regardless of whether or not you're using camera defaults (and regardless of whether the camera defaults are ISO-specific). I just tested this setup with several Canon EOS 5D raw files, taken with three different lenses, and verified that both custom camera defaults and custom lens defaults are working correctly (including ISO-specific camera defaults).

Using lens defaults will generally be necessary with your 20D, even when using Canon lenses, because it doesn't have complete lens identirication metadata. I just tested again in Camera Raw 8.2 using several 20D raw files taken with three different lenses (16-35 f/2.8, 24-70 f/2.8, 50 f/1.4) and verified that custom lens profile defaults work correctly, with and without camera defaults.

Can you please confirm exactly which procedure you're doing to set up your lens profile defaults? It may help if you can provide two of your 20D raw files (taken with different lenses). You can send them to madmanchan2000@yahoo.com (dropbox, yousendit.com, etc.).

Thanks,
Eric
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Dennis Thompson

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I'll go back and check again. If you have both camera defaults (serial # & ISO) does the correct lens come up? Should I set the lens default to Auto?

Thanks,
Dennis
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Eric Chan, Camera Raw Engineer

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Hi Dennis,

Yes, the correct lens comes up for both cameras (when I check the "Enable Lens Profile Corrections" box).

As noted above, for the 20D I needed to first select the correct lens profile manually from the popup menu (choosing Canon from the Make menu usually suffices) due to the insufficient lens model metadata in this older camera model. But after I selected the correct lens profile and chose "Set New Lens Profile Default" from the Setup popup, then going forward, just checking the "Enable Lens Profile Corrections" box will result in automatically finding my chosen lens profile. This step needs to be repeated for each lens that you use with the 20D (but just once per lens).

You should be using "Default" for the Setup popup menu for both cameras, not Auto. (Auto basically asks Camera Raw to find the best matching lens profile automatically. This will work fine for your 5D, but not the 20D for the reasons I mentioned above.)
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Dennis Thompson

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Eric,

Thank you so much for your help. I think I have it working now! This morning I took a shot using both cameras with each lens and every ISO combination. I changed the Camera Raw preferences back to "ISO default". The 5D seemed to work straight out. The 20D I had to do a little extra. For each lens & ISO I had to got thru the same process. Example - with 20D, 24-70, and ISO100 I choose the 24-70, then save camera lens defaults, then choose save camera raw defaults. Then repeat the process with each lens and ISO setting. It all seems to be working now.

I assume that originally I was bypassing the save camera lens setting.

Thank you again,
Dennis
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Eric Chan, Camera Raw Engineer

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Glad to hear you got it working, Dennis.

Enjoy,
Eric