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Canon Powershot G7 "Unidentified image"
On Mon, 24 Nov 2008 23:38:47 -0800 (PST), Bengt T
wrote: I have tried more than 5 different brands of SD cards with the same result ("Unidentified image" appearing from shots starting from picture no 257). The significance (..from picture 257..) makes me assume that there is a fundamental problem in the camera to write into the SD card from a certain memory location. Please note that this, in my case, only occurs in bracketing mode, 3 pictures in a sequence shoot and written into the SD card. I have, so far..., not noticed any problem with single shots. Could, in my case, indicate that the writing procedure by the camera is unreliable into SD memory area from picture 257, when many pictures, 3 in my case, is stored in a rather rapid sequence. /Bengt This sounds like a card's write-speed problem. Are you buying the more inexpensive slowest cards? After so many images a card's data-structure can make write-time even slower, greatly cutting into those slower-card's already slow write-times. Try a faster card, borrow one if you can just for testing. I would also carefully clean those internal contacts on the camera. A bit of oil on one of them might be preventing complete contact. During more rapid file-saving operations the card's check-sum routines, when re-trying to write erratic data, could be causing the errors. Use a cotton swab dampened with some isopropyl alcohol and clean those contacts, being careful to not leave any stray cotton strands behind. |
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