7D peripheral correction with Tokina 12-24mm II lens

Started May 5, 2012 | Discussions
MonteCarlo67
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7D peripheral correction with Tokina 12-24mm II lens
May 5, 2012

I just noticed that when I have my Tokina 12-24mm f/4 II lens on my 7D it says in the "peripheral correction" setting that lens data is available. I was under the impression that only Canon brand lenses have this information available. I hooked the camera up to the computer and used the EOS Utility to see what lenses are listed and it does not show up. Has anyone else noticed this with third party lenses? For what it's worth, I attached my only other third party lens (Sigma 18-50mm f2.8-4) and it says there is no information available. Could it be that the camera thinks a certain Canon lens (maybe the 17-40mm or 10-22mm) is attached? Sorry if this has been covered before but I tried a search and found nothing on this.

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Y0GI
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Re: 7D peripheral correction with Tokina 12-24mm II lens
In reply to MonteCarlo67, May 5, 2012

MonteCarlo67 wrote:

Could it be that the camera thinks a certain Canon lens (maybe the 17-40mm or 10-22mm) is attached?

I believe that you are on the right track here. In the EXIF data, there is a "Lens ID". If you check one of your photos with EXIF Tool GUI, you will find the Lens ID and possibly the associated Canon lens.

When the third party manufacturers make a lens, they do not have Canon Lens IDs, only Canon does. So, they will copy a Lens ID from a similar Canon lens and install it into the lens. Thus, when the camera querys the lens for its ID, the lens provides the ID loaded by Sigma, or whoever made the lens. Canon must have additional checks implemented because, as you found out, more than just the ID is required to make certain proprietary functions operate.
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Sailor Blue
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Re: 7D peripheral correction with Tokina 12-24mm II lens
In reply to MonteCarlo67, May 6, 2012

You don't say what program you are using, but I'll assume you mean Canon Digital Photo Professional. Since that is a Canon provided program it isn't surprising that they only put lens profiles for Canon lenses in the program. The list of lenses is on page 60-61 of the DPP manual, which is found on the EOS Digital Software Instruction Manual disk.

If you have access to either Adobe Photoshop or Lightroom then you can check their lens corrections list for your lens. If your lens isn't included in the Adobe lists then you can create your own lens correction profile using the free Adobe Lens Profile Creator. You can add this lens profile to the list in Photoshop and/or Lightroom.

http://labs.adobe.com/technologies/lensprofile_creator/

Another possibility is to search for a lens profile that someone else has already made available. You can search for your lens profile using the Adobe Lens Profile Preview software.

http://labs.adobe.com/downloads/lensprofile_creator.html

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Austin_Luker
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Re: 7D peripheral correction with Tokina 12-24mm II lens
In reply to Sailor Blue, May 6, 2012

Sailor Blue wrote:

You don't say what program you are using, but I'll assume you mean Canon Digital Photo Professional. Since that is a Canon provided program it isn't surprising that they only put lens profiles for Canon lenses in the program. The list of lenses is on page 60-61 of the DPP manual, which is found on the EOS Digital Software Instruction Manual disk.

If you have access to either Adobe Photoshop or Lightroom then you can check their lens corrections list for your lens. If your lens isn't included in the Adobe lists then you can create your own lens correction profile using the free Adobe Lens Profile Creator. You can add this lens profile to the list in Photoshop and/or Lightroom.

http://labs.adobe.com/technologies/lensprofile_creator/

Another possibility is to search for a lens profile that someone else has already made available. You can search for your lens profile using the Adobe Lens Profile Preview software.

http://labs.adobe.com/downloads/lensprofile_creator.html

Wow your really missed the question here didn't you!
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