hi,

my 5D started to produce weird looking images. every 10th or 15th frame. has anybody experienced anything like this?
looks like a serious problem to me. or maybe rather something to do with the cf-card?

stefan




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It could be a loose mirror. Try some heavy shooting in continuous mode. If it's the mirror it will probably fall off, as mine did. Repair cost me about $350 in Bangkok. It would probably be more expensive elswhere.

Given the structure of that image, plus the striping configuration of the 5D raw file, I strongly suspect a corrupted raw file resulting from the CF card or the reader you are using. It is possible that the 5D itself has an issue but I think that's lower probability.

I get this once in a while from my 5D, but not every 15 images, maybe one out of 50 or 100.

I believe it is a card / write problem as Eric has proposed. Do you number your CF cards? If it happens that often, see if it is associated with one card. Mine's so infrequent I always forget which card it was the last time...

DChew

It has nothing to do with the sensor, but with corrupted data. The vertical split is due to the data organization: the raw data is not organized row by row, but half row wise.

The encoding of the raw data (JPEG lossless compression) is very sensitive to even the loss of a single bit; the rest of the image can not be decoded any more.

thanks for your ideas!
I started thinking in terms of cf-card/reader too.
Lately I have been shooting in hospitals and especialyvery close those Magnetic Resonance Tomography (MRT) scanners (that create a massive magnetic field to scan a whole person) and wonder, if that could have caused a fault in the card.

for now, I am just getting new cards and card reader and see how its going.

thanks again

stefan

I would have thought that you´d have been aware of the dangers of magnetic fields if you do that sort of work! Just be grateful you don´t have an artificial hip: you can´t have one of those magnetic scans if you do, so should you ever have the misfortune to need a new hip, don´t forget this bit of information - could save your life.

Big magnetic fields could possibly have interesting effects with hard drives... I´m surprised no staff member was quite bright enough to warn you of the dangers.

Obviously, I hope you never do need a new hip!

Rob C