Am I having sensor issues? - DPChallenge Forums

07/22/2012 08:56:11 PM · #1

Hi,

I shot some surf stuff today. Second time out with this new sandisk 8gb ultra 30bps. I was shooting high speed full burst in full raw on a Canon 40d. Thing is, I don't see the corrupted image showing up on the cameras lcd. Only when I import to lightroom 4. Or even open the raw file with photoshop camera raw.

Could it be a sensor issue? Or maybe the card? Should I format it again.

Canon EF 85mm f/1.2L II USM

07/22/2012 09:03:27 PM · #2

I'd suspect the card. The image on the LCD uses the embedded JPEG, so it can be fine while the RAW data is corrupted. Where did you buy the card?

Cory

Canon EOS-1D Mark IV

07/22/2012 09:06:19 PM · #3

card or contacts... Could also be a few other things..

Try an older card, if that works fine for a while, then try the new card again, without doing anything.

See if the error is still occurring.

If so, I would suggest returning the card, and insisting on a replacement - will you ever honestly trust your data on that card?

If you do choose to keep it, try formatting it, and giving that a shot.

If the camera is doing this with both cards, I'd try to clean the contacts, but this could be tricky...

If none of that resolves the issue, you might try taking it apart to ensure that a ribbon cable hasn't come loose, or that there's not some other obvious issue..

If, after all of that, your camera still doesn't work, then you'll need to get Canon repair on the phone.

07/22/2012 09:11:06 PM · #4

Originally posted by kirbic:

I'd suspect the card. The image on the LCD uses the embedded JPEG, so it can be fine while the RAW data is corrupted. Where did you buy the card?

Amazon featured merchants "IT Supplier Inc".

I used it before for a wedding and had no issues. But that was single shot. I'll try those things

Cory suggested.

Canon EF-S 18-55mm f/3.5-5.6 USM

07/22/2012 09:17:10 PM · #5

Closely examine your card, and reference this page to see if the card is genuine or counterfeit.

RayEthier

Canon EOS-5D Mark II

07/23/2012 05:32:54 PM · #6

Thanks for that info Kirbic... good to know these things.

Ray

Mike

Canon EOS-5D Mark II

Tamron SP 24-70mm f/2.8 Di VC USD Canon Mount

07/23/2012 09:51:36 PM · #7

im betting its the card, especially in burst mode will full raw. probably had a hard time writing to the card and data got lost/corrupted.

JulietNN

Canon EOS R7

Tamron 16-300mm Di II VC PZD MACRO w/Canon Nikon mount

07/23/2012 10:54:34 PM · #8

For sure the card, has the exact same thing with my card shooting, you guessed it,,,, surf.

I had it laying out on a table on the balcony, my card is used to 1-8% humidity, dry dry desert air, then took it up to CA, left it on the balcony after I downloaded from it, then took it into an ice cold room, then out to the beach. 500+ shots looked exactly the same as yours.

Went out bought a new card, problem solved. Took the bad card back to AZ and never had a problem with it again. But after a year it started getting wobbly again, so tossed it.

Panasonic LUMIX DMC-LX100

07/24/2012 02:07:47 AM · #9

Thanks for the page link

kirbic. Mine looks to be genuine. I formatted it, so when I get a chance I'll take some shots again.

spiritualspatula

Nikon AF-S NIKKOR 24-70mm f/2.8G ED

07/24/2012 03:26:13 AM · #10

The shots look the exact same as a friend of mind who had a badly corrupted card. I was able to use Sandisk's Recovery Pro to get almost every single photo off the card intact, but a few were lost.

RamblinR

Olympus OM-D E-M1 Mark III

Olympus 12-40mm f/2.8 Pro

07/24/2012 04:55:09 AM · #11

Are you using a card reader to download?

If you are I would suggest downloading with the lead to the camera and see if the images import without defect.

I had this happen to me and a new card reader solved the problem.

07/24/2012 09:01:35 AM · #12

Sounds like the card is genuine. That doesn't rule out a card problem, but it makes it pretty unlikely. Maria's suggestion of trying a different download method is a very good one. There are known cases of incompatibility between certain card/reader combinations. Using the cable with the camera takes the reader out of the equation.

Olympus OM-D E-M1 Mark III

07/24/2012 03:35:24 PM · #13

I don't ever use a reader, always direct from the camera USB. Could it be due to the highspeed shooting/buffering etc??

RamblinR

Olympus 12-40mm f/2.8 Pro

07/24/2012 05:09:58 PM · #14

If you are downloading directly from the camera are you using the USB 2 port.
I know this sounds odd but sometimes the USB ports on the front of computers are not as fast as those on the back (providing we are talking about a tower)

Otherwise I might suggest borrowing a friends good card reader to see if the problem exists when using this method.

I see you have stepped up to a 60d from a 40d. This is when the problem first came up for me (moving from a 40d to a 7d) must have something to do with the file sizes but that is when my old cheap card reader couldn't handle it and I got corrupted files. Again I think it may have had something to do with the transfer.

I now use a good quality Lexar card reader (reads both SD and Compact Flash) and have not had any more problems. If you are seeing the images correctly on the camera I think the file would be alright as this image is generated from the original so has to be as seen.

Cheers

Canon EF 17-40mm f/4.0L USM

07/24/2012 06:46:18 PM · #15

Originally posted by RamblinR:

If you are seeing the images correctly on the camera I think the file would be alright as this image is generated from the original so has to be as seen.

That's not necessarily true. The camera's LCD image is generated from the embedded JPEG, so the RAW data can still be messed up while the embedded JPEG is fine. Corruption during transfer is still a possibility, but I'd regard it as less likely if the camera was used directly connected to the camera. Still, it's worth trying to transfer the files more than one way to see if the result is the same. That of course assumes that you have some corrupted files to test with.
There should be no issue with the card you are using and the 60D. It's plenty fast for the camera, and if the camera runs out of buffer, you should still not get corrupted files.
If in the end you can verify that the files are really corrupt as written to the card, and not corrupted during transfer, then I'd exchange the card and see if that solves the problem.

blindjustice

Canon EOS-7D

07/24/2012 09:39:53 PM · #16

My eyes must be bad, up until right now I thought this thread was entitled " I'm having a senior issue"