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Important Note Regarding Lightroom 2.5 and Camera Raw 5.5 for those using PowerPC

Sep 26, 2009 5:21 PM

I just posted a blog entry on an issue with Ligthroom 2.5, Camera Raw 5.5 and DNG Converter 5.5 that affects Mac PowerPC customers.  Please read the entry here:  http://blogs.adobe.com/lightroomjournal/2009/09/important_note_regardi ng_light.html

 

Unfortunately, the comments on the Lightroom Journal blog do not seem to be functioning so please comment in this thread.


Regards,

Tom Hogarty

Adobe Systems

Lightroom, Camera Raw, DNG Product Manager

 
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  • Currently Being Moderated
    Sep 26, 2009 5:52 PM   in reply to Tom Hogarty

    This must affect less than 1% of your users, but will be a Godsend for those who've the particular hardware involved in the glitch. Thanks for the heads up.

     
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    Sep 27, 2009 12:03 AM   in reply to Tom Hogarty

    While preparing this update, you might also look into the problem of printing through Lightroom on the Epson R800. Printing through PS CS3 works fine but Lightroom produces darker tones even after having followed all the tips on the various forums.

     
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    Sep 30, 2009 2:33 AM   in reply to Tom Hogarty

    I have experienced exactly these symptoms on images from Olympus E500 and E520 Cameras, and cured it by reverting the software as you say, However, I am not using a MAC, but a very average PC running WindowsXP SP3, so I don't think the problem is just confined to MACs.

     

     

    John

     
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    Sep 30, 2009 2:53 AM   in reply to Olyjohn

    I agree since I also experienced the problem with my Olympus E510 files on my Vista and MacBook Pro  systems.

     
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    Sep 30, 2009 4:57 AM   in reply to Tom Hogarty
    Customers converting their proprietary raw formats from Sony, Olympus, Panasonic and various medium format digital cameras should also not use the DNG Converter 5.5 with the compatibility setting lower than "Camera Raw 5.4 and later."

    Is this going to permanently damage the RAW data?

     

    If yes, how come? If the problem is in the demosaicing, the future version (5.6?) should bring the DNG's back to live. I thought, converting to DNG only copies the raw data to a new "container" (ok, maybe some lossless compression), but does not alter the raw data in any way.

     
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    Sep 30, 2009 5:41 AM   in reply to Dorin Nicolaescu-Musteață

    In some cases using the older compatibility option will force the creation of a linear DNG, which is demosaiced. Hence the bug in the demosaic method will effectively be baked into the image data.

     

    For mosaic DNGs there is no issue.

     

    Eric

     
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    Sep 30, 2009 5:42 AM   in reply to Olyjohn

    Can you please provide the specs of your PC system, specifically the processor?

     

    Eric

     
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    Sep 30, 2009 5:50 AM   in reply to MadManChan2000

    In some cases using the older compatibility option will force the creation of a linear DNG, which is demosaiced.

    Thanks. Understood.

     

    This didn't come to mind, because I wasn't aware there were other cases of forced conversion to linear, apart from several recent Panasonics, for which the manufacturer wanted forced behind-the-scene lens correction.

     
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    Sep 30, 2009 12:20 PM   in reply to MadManChan2000

    My PC has an AMD XP2400 + 2.00GB processer, 1.00GB RAM, Jetway V400 ADBL Motherboard.

    John

     
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    Sep 30, 2009 12:22 PM   in reply to Olyjohn

    Sorry, that should obviously have read AMD XP244+ 2.00Ghz

     
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    Sep 30, 2009 12:29 PM   in reply to MadManChan2000

    I'll get this right  soon, Ithink my brain has gone on strike. AMD 2400+ 2.00Ghz.

     
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