How to disable distortion correction for micro 4/3 lens

Hello,
I have an Olympus E-P2 and Panasonic 14-45mm lens. Adobe Lightroom 3 and Photoshop CS5 appear to be performing some very heavy-handed distortion correction at the wide-end of the zoom (running the file through a different raw converter yields dramatically different results at the edges). This is without selecting any lens profile or enabling manual correction. How can I disable this?
Thanks,
Dara
P.S. Strangely, ACR 6 is not doing any correction of chromatic aberration. Given that the system is set up to try and fix distortion and vignetting automatically, it would make a lot of sense to fix CA too.

That's a solution. It doesn't however answer my question. Clearly there is some metadata tag that tells ACR what corrections to apply. Using EXIFTool, I can replace all the metadata with that from a shot with a non-correctable lens. Unfortunately, this screws up my cataloguing by replacing other things like focal length, aperture and so on. It would be nice to know the exact tag. Thanks.

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Raw Update 4.08 removes distortion correction for Sony RX100 files?

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TBannor wrote:
I loaded raw update 4.08 on my 27 inch iMac yesterday. A while later, I opened Aperture 3 to export some RX100 files from a family event last week to Smugmug. To my horror, as the photos loaded when I viewed them, the automatically applied lens distortion correction was removed and obviously it was worst with the wide ones. The issue also shows up in iPhoto, so it seems a general OS thing. To confirm it was indeed due to the raw update, I exported the same raw files to my MacBook Air, which I hadn't updated yet. Sure enough, Aperture loaded them with distortion correction just fine. Obviously, I won't be updating the MacBook until this issue is fixed.
This may be disappointing, but it is expected. Note that Aperture has removed nothing, however. What you are seeing is caused by using a RAW Original instead of a JPG Original.
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Last edited by Xwang (2014-10-11 08:06:16)

How to disable distortion correction for micro 4/3 lens

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