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When I try to open from within Photoshop, through Open as, then Camera Raw, it lists this extension but doesn't open the file. I need an explanation in a "for dummies" version. This is my second day shooting raw, and I am not familiar with technical terminology and abbreviations found in answers here that deal with opening raw files. I use Photoshop CS4 Version 11.0.2. My camera is Canon Rebel T3i. A Digital Photo Professional software comes with the camera, but I am so used editing my JPEG photos in ACR that would prefer to continue using it for raw files.

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3 Answers 3

up vote 2 down vote accepted

The Canon Rebel T3i is supported in ACR version 6.4.1 which, unfortunately, means Photoshop CS5 or better for you: for some more detail. You may want to consider the upgrade to CS6 or, alternately, getting the latest Lightroom version which will allow you to export to Photoshop while handling the conversion.

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What is the latest Lightroom version? 5? –  Lena Borisova Sep 7 '13 at 17:19
@Lena - Version 5 is it, it's quite good in my opinion. I use it with Photoshop CS6 –  John Cavan Sep 7 '13 at 17:51

You need a newer version of ACR, and for that a newer version of Photoshop. An alternative to buying a new edition of Photoshop could be to use raw therapee. If you edit your raw files with raw therapee, you can do further processing in photoshop cs4, if you like. Raw therapee:

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RAW Therapee this is awesome man! I fiugred it out under 5 minutes! LOL - I don't understand how I never found this before after searching for all these RAW issues. –  ppumkin Nov 17 at 20:33

You can convert your cr2 files to DNG files. DNG files are openable with anything.

You can convert them using this tool

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Is DNG a raw format as well? Will I loose any information in conversion? –  Lena Borisova Sep 7 '13 at 17:17
Typically, no information is lost when going from cr2 to dng. The wiki however, [], says that there are reported cases where not all data is kept. *shrug. I would suggest then to store your cr2 files and convert to DNG just for processing and then kill the DNG later. –  Peter pete Sep 8 '13 at 0:46

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