Lens profiles/ca correction?

Hi,
the CA correction is more automated now. How do i correct CA if the lens profile is not there. (tokina 12-24)?
am i missing something here....
Bart

Thanks
I tried it on an overly processed image. On normal images it does a good job..
Great feature.
Op 10 jan. 2012 om 13:03 heeft Ian Lyons <[email protected]> het volgende geschreven:
Re: lens profiles/ca correction?
created by Ian Lyons in Photoshop Lightroom 4 - View the full discussion
Lens profiles and manual sliders are no longer required for CA correction, the process is automatic. However, if you have an image where the CA correction isn't working as epected then it would be useful to submit a copy of the image to Adobe.
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It would probably be easier for Adobe to rewrite the LPC to allow vignetting to be computed from a single shot of a blank wall without a target in the shot, than to have someone rewrite a camera app that allows manual exposure.
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Hello, Can you tell me where I can found the lens profil for the Canon 500MM F4 Mark II

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Given the 600mm F4 IS II (February 2011) lens profile hasn't been created yet it may be a while (if ever). I wouldn't worry about it since the lens profile only corrects distortion and vignetting. There is virtually no distortion with either of these lenses and vignetting is within 0.2EV using the 600mm profile, which you can set as the "default" profile. Personally I think people put too much emphasis on the need for "automatic" lens profile correction. All my lens profile defaults are set to Distortion = 0 and Vignetting = 50. I change the setting only when an image appears to need more correction. WHY?
REASON
Distortion correction crops part of the image and increases "edge" stretching with wide angle lenses–It's a trade-off for straight lines in the image. IMHO-If it's not visible in the image you don't need it. 100% Vignetting correction setting can look un-natural and amplifies lens aberrations and softness in the corners, which is where vignetting correction is applied the most.
My 2 cents worth.

Can lens profiles be used to remove distortion in Elements?

I am preparing to buy my first photo editor, so as to be able to use the lens profiles that work with PS, Lightroom, and Camera Raw. Do these profiles work in the Elements package?

R_Kelly a écrit:
The Camera Raw and Correct Camera Distortion plugins for photoshop elements don't give the user a choice of of using lens profiles for correction, so probably not.
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8.4RC mentions support for Fuji lens profiles - any details known?

Curious if this is new support or if it's always been there and now ACR shows a message about it. I installed the ACR 8.4RC and loaded a RAW file from my X-T1. Looking at the Lens Corrections tab and the Profile sub-tab, there's now a message at the bottom that says "Built-in lens profile applied: XF14mmF2.2 R. Click for more info." When I clicked, a small dialog box appeared which offered a little more info:
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I notice that despite what they say, going to the Color sub-tab and checking Remove Chromatic Aberration was still required for some images.
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The information about what built-in lens profile is being applied is new to ACR 8.4, but the application of built-in lens profiles is not new.
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LR 5.4 and embedded Fuji lens profiles -- true or not?

Hello there, I have just bought LR 5.4 and was looking forward to using it with my Fuji X-T1. The camera is supported by I can't find any lens profiles for the XF lenses. I saw on the Web LR apparently used embedded lens profiles found in the RAW files. Is this true? If so, how does it work and why are there unofficial lens profiles available via the lens profile downloader? What benefit do these offer?

Photoshop CC and ACR 8.4 have a way to see when a built-in profile is used, and yes the newer Fuji cameras have built-in lens profiles. Lens Profiles can correct chromatic aberration, geometric distortion and vignetting. Sometimes a built-in profile only corrects some of those, so a downloadable profile could be adding a correction the built-in one doesn't do, or improving on it in some way.
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I have a Olympus E-450 with a Olympus Zuiko 14-42 mm lens and there is a lot of spheric aberration in low focal length. I am looking an Adobe Ligthroom lens profile to correct it.

There is no internal or external lens profile built into Adobe products for your lens, and no external Olympus lenses supplied by Adobe:
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After upgrade to lightroom 4.3, my canon 7D is not showing up in lens profile correction

I think this happened after upgrading to lightroom 4.2, but I am not sure as I haven't used Lens profile correction in some time.
When I enable the "Enable profile corrections" checkbox in "lens corrections" The Make and model of the lens is recognized, but the profile field has only 2 optoins, "canon EOS 1D MK III" and "Adobe". It does not have any other options including the EOS 7D that I use. Tried uninstalling and installing again, that didn't help.
I found in the forum that for Win 7, lens profile is supposed to be stored in "C:\ProgramData\Adobe\CameraRaw\LensProfiles\1.0", in my case the LensProfiles directory does not exist. There is a CameraProfiles directory(C:\ProgramData\Adobe\CameraRaw\CameraProfiles).
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There is nothing wrong with your lens profiles.
The issue is that you are adjusting a JPG not a raw file. When adjusting raw files the camera model is not listed with the profile because it doesn’t matter and all of them say Adobe as their source for Canon cameras at least, but when adjusting JPGs the camera may have done certain adjustments internally so it does matter and is why you see the wrong lens-distortion occurring when choosing the 5D Mark III profile with your 7D JPGs.
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Lens Profile Tool Addition – White Balance Offset Correction

I have noticed that my Canon 17-40mm and 70-200mm F4 IS lenses have virtually identical color temperature and can use the same white balance setting. My Sigma 50mm F2.8 Macro lens is another story, requiring almost 200K and +15 change to White Balance sliders. I am sure there are cases where Canon’s lenses will differ more widely and exhibit a similar degree of white balance differences, not to mention use of UV or 1B protection filters. An 85mm F1.2 lens using “rare earth” low dispersion glass, will have a warmer color temperature than a lens using more common glass elements.
I use the X-Rite ColorChecker Passport to create custom profiles for each of my camera bodies. I typically make separate correction presets for Daylight, Cloudy, and Tungsten (2700K). This requires changing the LR White Balance sliders to obtain “neutral gray in the ColorChecker image files shot in each of above described lighting conditions. It does not appear necessary to create a separate ColorChecker camera profile for each lens, just correction to the LR white balance slider settings.
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EXAMPLE:
Open a DaylightColorChecker Passport image file in LR, apply Cloudy Camera Profile, and adjust White Balance for the gray scale patches using the Eyedropper Tool. Then look at the 'Before' and 'After' images....you will see NO visual change to any of the color patches. I saw only a very slight change when doing this with the Daylight to Tungsten (artificial light source) comparison.
The relatively small change in color balance between lenses (~500K max.) should have no measurable or visible affect to the ColorChecker Passport created "Camera Profile." The ColorChecker Passport or any other "Camera Profile" creation tool is first and foremost correcting for differences in the camera's image sensor color rendering.
SUGGESTION:
Since this white balance difference is a factor of the lens, it would be very convenient to add another tool in Lightroom's and Camera Raw Lens Profile panel for “White Balance Offset.” This allows setup of LR defaults for one specific lens type, such as your most used lens. Then you use the new ‘Lens Profile’ located ‘White Balance Offset’ correction tool to adjust white balance for all of your other lenses. In addition, Adobe or camera manufacturers could also provide the 'White Balance Offset Correction' as a function of the lens spectral response deviation from linear. This would provide a "uniform method" of calculating and adding the White Balance correction to the 'Lens Profile.' Since this is a factor of the lens only, the “lens offset correction” can be used with ANY lens/camera body pairing, The current LR and Camera Raw White Balance settings are then only used for “Global” correction of lighting conditions, and NOT for lens differences.
This is a linear mathematical function,which should be extremely easy for Adobe to add the ‘White Balance Offset’ correction feature to LR’s and Camera Raw's Lens Profile GUI. Just like many other tools in LR that some don't use, you can choose to use it or not!

Interesting suggestion. Thanks. -Simon

Lens profile corrections unresponsive

I need a hand in troubleshooting the following:
The last time I accessed my catalog I was able to use the automatic lens profile corrections feature of Lightroom. Now, I am unable, and get the error message stating that Lightroom is unable to locate a matching profile automatically.
I'm using supported equipment (Nikon 24-70 / 70-200) and the lens shows up in the EXIF data as viewed in Lightroom.
At first I thought this was a result of first using Photomechanic to caption my images but when I attemped to import into lightroom directly from the card, the same thing happend.
Any ideas?

Profiles are not presets, they are stored somewhere in a shared system directory. Camera Raw shares the same location for profiles, that's why uninstalling CS5 removed the profiles.
Reinstall Lightroom.

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Does anyone know where to get the plug-in to use the auto lens profile correction in Lightroom for the above stated lens? Adobe only have the older 18-250, and even on the new 5.3 LR version, still have not supplied the plug-in for this lens!

LR doesn’t use plug-ins for lens support. The support is either built into the program or contained in external .lcp files that each new version update adds a few of.
Looking at the new lenses supported for the ACR 8.4 release candidate at Adobe Labs, which would presumably be added to LR 5.4, I don’t see the lens mentioned as newly added:
http://labs.adobe.com/technologies/cameraraw8-4/?tabID=details#tabTop
Looking in the Adobe Lens Profile Downloader, for lenses that third-parties (users like you and I) have supplied, I don’t see any 18-270 listed, either.
What camera are you using the lens on?

Decision-making process EXIF = correct lens profile

I created a lens profile for my new camera Sony SLT-A77 with lens SAL-1680Z.
I use ACR 6.6 with activated feature "Enable Lens Profile Corrections" and Setup = Auto.
My new profile is found automatically because of EXIF information in the DNG file
and matching tags in the lens profile file.
EXIF:Make = stCamera:Make = "SONY"
EXIF:Model = stCamera:Model = "SLT-A77V"
EXIF:Model = stCamera:CameraPrettyName = "SLT-A77V"
EXIF:LensModel = stCamera:LensPrettyName = "DT 16-80mm F3.5-4.5 ZA"
But my problems start with the second lens. This is Tamron SP 70-300mm.
There is a lens profile provided by ACR 6.5: "SONY (TAMRON SP 70-300mm F4-5.6 Di USD A005S) - RAW.lcp"
But the tags in this file aren´t matching the EXIF in my DNG files.
So I tried to edit the tags like in my own lens profile.
EXIF:Make = stCamera:Make = "SONY"
EXIF:Model = stCamera:Model = "SLT-A77V"
EXIF:Model = stCamera:CameraPrettyName = "SLT-A77V"
EXIF:LensModel = stCamera:LensPrettyName = "TAMRON SP 70-300mm F4-5.6 Di USD A005S"
But in ACR6.5 this profile isn´t found automatically. I have to choose manually
in the Lens Profle menu the Make selector. But I have to choose "Tamron".
I can´t understand this behavior because the tag is stCamera:Make="SONY" and
there is no tag with "Tamron" in the profile.
I deleted all other lens profiles on the computer to exclude problems with another lens profile.
In the document "Adobe Camera Model V1.0" on page 11 I found the required EXIF tags,
but I suspect the mechanism ACR choose a lens profile is different.
Ingo

There is also a LensID field in xmp:aux that would affect the lens matching. Bring your photos in PS/Bridge, show the FileInfo dialog, go to the Advanced panel, you can tweak the metadata in the lens profile to match the same values shown in the FileInfo dialog.
-Simon

Lens profiles/ca correction?

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