Raw conversion bug? (Canon 40D, Lightroom 2.7)

pernetoperneto Registered Users Posts: 4 Beginner grinner
edited May 11, 2010 in Finishing School
Hi,

I've just noticed one of my pictures (attached) shows a weird rectangular artefact, which could come from a Raw conversion bug, or maybe something else. Have you seen anything like it before?

Thanks,
Olivier

Comments

  • Scott_QuierScott_Quier Registered Users Posts: 6,524 Major grins
    edited May 11, 2010
    It might. Have you opened the CR2 in DPP to see what the Canon software has to say about it?
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  • RichardRichard Administrators, Vanilla Admin Posts: 19,967 moderator
    edited May 11, 2010
    I think it's more likely to be a problem with your Flash card.
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  • pernetoperneto Registered Users Posts: 4 Beginner grinner
    edited May 11, 2010
    Scott_Quier wrote: »
    It might. Have you opened the CR2 in DPP to see what the Canon software has to say about it?

    I only have a DNG file now, I didn't realize there was a problem until later. Can DPP open DNG files?
  • pernetoperneto Registered Users Posts: 4 Beginner grinner
    edited May 11, 2010
    Richard wrote: »
    I think it's more likely to be a problem with your Flash card.

    The card is fairly new though (end of February). Should I be worried/get a new one? How would you test that?
  • kwcrowkwcrow Registered Users Posts: 132 Major grins
    edited May 11, 2010
    Olivier,
    I have a 40d and use lightroom 2.7 and I have not seen this happen to me. I have over 100,000 images converted from RAW to dng.
    perneto wrote: »
    Hi,

    I've just noticed one of my pictures (attached) shows a weird rectangular artefact, which could come from a Raw conversion bug, or maybe something else. Have you seen anything like it before?

    Thanks,
    Olivier
  • RichardRichard Administrators, Vanilla Admin Posts: 19,967 moderator
    edited May 11, 2010
    perneto wrote: »
    The card is fairly new though (end of February). Should I be worried/get a new one? How would you test that?
    Not too sure how you could do a rigorous test without spending an inordinate amount of time on the matter. But here's a quick test you could perform: Put the card in a reader and copy a bunch of CR2 files to it that you know are good. Then look at them in DPP and see if you find the artifact. Then import them to LR the way you did and look again. If the DPP version shows a problem, I would say it's the card. If DPP doesn't and LR does, it would seem to be a LR issue, though it's a little hard to believe that we wouldn't have heard people screaming bloody murder about it before. If neither one shows a problem, then we can only scratch our heads till someone else provides a suggestion.
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  • pathfinderpathfinder Super Moderators Posts: 14,708 moderator
    edited May 11, 2010
    Richard wrote: »
    I think it's more likely to be a problem with your Flash card.
    15524779-Ti.gif

    Not certain, of course, but seems more likely.

    What is the brand of your card? Sandisk, Lexar, Transcend or something else?

    There are bad cards when new out there - that I am certain of, especially off brand cards.

    I will only use one of those three brands I mentioned!! Too many failures with other brands!!!
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  • John MuellerJohn Mueller Registered Users Posts: 2,555 Major grins
    edited May 11, 2010
    Do you format your card after each off load?
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