Nikon D800E, Image File Corruption

Discussion in 'Nikon' started by shuncheung, Aug 25, 2012.

  1. ShunCheung

    ShunCheung Administrator

    A few days ago, I was at a national park visitor center and I captured this image from the outside. It looked fine when I reviewed it on the on-camera LCD. However, when I got back to the motel, I realized that the color on most of the image is purple, which probably means the red and blue components are there but the green part is missing. Moreover, the sign that should be on the right side of the image is moved to the left, but the wording is correct, i.e. not a mirror image. Therefore, it is not the left and right sides are flipped. Rather, part of the right side of the image is now on the left, and part of the left is now on the right.
    Since this was merely a casual snapshot, losing it is not a big deal. In fact, I had captured another almost identical image at that same time. Moreover, I had set my D800E to the backup mode so that each image is written onto both the SD card and CF card inside. This error image is from the SD card. So I checked the CF card, and its image file is just fine. Therefore, this seems more like a card write problem. I have since captured a few hundred more images on that camera, and every image is fine.
    This type of problem might have heppened to me a couple of times before after using DSLRs for 10 years now. I suppose if you have really important images, it pays to capture a few more samples to choose from, and with cameras that accept two memory cards, I would use the backup mode regularly.
    Incidentally, both cards I used that day are Lexar. And this is merely a one-time glitch. Both cards have been fine since.
    00akyq-492627584.jpg
     
  2. ShunCheung

    ShunCheung Administrator

    Good version from the CF card
    00akys-492627684.jpg
     
  3. Yes indeed! This is exactly why dual-card bodies (and actually using them as such) are so important for people shooting things like weddings/events. Cheap insurance against a rare potentially very awkward loss of data.
     
  4. Shun, it looks like the bad image has wrapped around on itself. Look at the small outdoor light on the right side. It is still on the right side of the bad image (barely), but the sign is now on the left as you point out. Very odd. I have never experienced anything like this.
     
  5. Glad the back-up system worked for you!.
    With regard to dual-storage, ie the same image to both slots, how does the buffer size and card speed factor in? I assume they write simultaneously rather than sequentially and you choose which to write to first.
    Pro SDs are normally a bit slower than Pro CFs...is it best to use same speed? or even if you have one fast and one slow, the rate limiter is always the slowest card, so having a fast CF is pointless WRT burst speed etc.
    EDIT. 'I have since captured a few hundred more images on that camera, and every image is fine.'


    I assume that's with the same 2 cards as back up? Not too sure I'd trust the SD card in an important situation though ??
     
  6. Hi Shun, is it possible that you turned the camera off too soon, ie while the image was being written to the SD card?
     
  7. You can turn the camera off whenever you like as long as you don't either remove the battery or the card.


    I think the number of corrupt images is inevitably going to be higher on the D800/E bodies. The more pixels you have to
    get right the more opportunities for corruption. At some point they will have to (should) put some robust EDAC system in
    place. Until then, backup cards are a good thing.
     
  8. ShunCheung

    ShunCheung Administrator

    Actually, I immediately took another almost identical image after this one, and that one was fine on the SD card, so are
    the other about 100 images and video I captured afterwards that day. I didn't check any other image on the CF card as I
    don't need them.

    Most likely this is a one-time glitch. I don't think SD cards are any worse electronically. My main problem with SD is that
    they are physcially more fragile. I have cracked a couple of SD in the last 2 years and also damaged some of that little
    switch that locks the SD card. CF cards are more robust but of course the pins on the camera side are somewhat
    vulnerable.
     
  9. I had something similar with a Lexar CF card with my D200: it seemed fine after that but failed 4 months later.
     
  10. I use both Nikon D3200 and D7100. Both cameras have the same problem as described above. Every second or third image was corrupted. D7100 has two SD card slots. I use one for RAW and another one for JPEG images. Corruption appears on both SD cards but not always on the same image simultaneously (ie. RAW version of one image is corrupted but JPEG version is readable). I suspect on Kingston SD cards I use in both cameras. If anyone found a solution for this problem, please let me know.
     
  11. I believe I have found a solution! It appears that SD card reader I used was not good! When I inserted SD card into another, my lap top built-in SD card reader, there was no any corruption on the images.
     

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