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Using a Canon 7D with 60MB/s compact flash. When shooting at high-speed continuous, after about 6 shots I get some files that can't be read in Lightroom 3. I would have thought they wouldn't have been taken if the 7D couldn't keep up. Low-speed continuous seems to be okay, so I'm guessing it's that, but I'd rather not get can't-read photos at all. Am I doing something wrong?
Hi Randy- What brand of CF card are you using?
SanDisk Extreme, 60MB/s, UDMA, 16GB.
Randy- That card should handle a lot more images before things slow down, but that's all that should happen, not image corruption. You probably know that images are initially stored in a fast buffer in the camera body and then written to the memory card. With slow cards, the buffer can fill up fast if you lay on the shutter release, and then you have to wait for it to clear as the images are written to the card. Anyway, all this is automated and you should not be getting unreadable files. Are they unreadable by other software? Are you shooting RAW or jpegs? What message do you get from Lr?
This may be a problem with the specific memory card you have (not the brand but the card itself). Try another one and see if you get the same symptoms.
I agree with John. Sounds like a defective card or camera. Have you tried other cards in your camera or your card in another camera to see if you can duplicate the problem?
This sounds a little like the problem with the firmware for the 1D Mark IV. Perhaps upgrading the firmware would make a difference.
RAW / CR2 only.
I had the same problem trying to open in Windows Photo Gallery (with the RAW / CR2 plugin).
I have 1.2.5 for firmware, I think that's the latest.
I just did another 60 at high-speed continuous and got no defects. Don't know if it was a different area of the CF or if something else happened last time.
Randy
Since it's not been mentioned or asked, have you reformatted the card?
As with any storage device deleting files can go wrong, a cameras computer probably has less sophisticated error detection than a conventional computer so if something goes wrong it won't adapt.
Lexar say don't do it http://www.lexar.com/content/lexar-memory-card-tips and there is no real reason that this shouldn't apply to other brands
