40D image flaw

I noticed this 2 times now with my 40D. I sometimes get a photo that has a bar like it has been cut and

pasted back in the wrong spot. see attached. Has anyone else had this happen? I shot this with a 40D

with my Tamron 28 - 75 lens.

Looks like a card corruption to me; make sure you connect direct to a USB2 port on the computer when downloading (ie not through a hub).

 

I sometimes get similar downloading to one of my computers - if I try the other one the images are OK.

 

If it persists maybe try another card.

I had the same thing...I experimented with different cameras, cards, reader, etc. Finally, I got a new computer...I am still using the same camera, cards, and card reader but the problem went away.

<p>Reformat the card (in the camera, not in a computer). Try a different card. If you're downloading directly from the camera, use a card reader.</p>

I download off a card reader into the new iphoto. Could be something there. Thanks I

thought it was a problem with the camera. I will try re-formatting the card.

 

What is the best brand of CF card to use? I have a cheap one and that may be the cause.

Sandisk Ultra is a good one. Be very careful buying online as some of those, even with the same names are slow/inferior copies.

"Be very careful buying online as some of those, even with the same names are slow/inferior copies."

 

Sage advice.

 

It's been estimated that over 90% of Sandisk / Kigston / Sony flash memory sold on eBay is counterfeight.

 

I'd strongly suggest buying only from reputable dealers (B&H, Adorama, Amazon etc).

I noticed in the viewfinder the photo is fine, its when I copy it to my computer do I see the

strange bar. Would that mean its the reader and not the memory card?

 

thanks for all the posts.

It is either the card reader, or the cable. Buying a new card reader would get you both, so if you're within easy returning distance of an item, get a new reader and try it out.

 

alternatively you could also try a different USB port before heading to the store, just to make sure. But I think you have a greater chance of having a bad reader or cable.

The camera creates a small jpeg thumbnail which is what you are viewing on the camera, not the full size Jpeg or Raw image. It is likely the card and/or reader.

<cite>I noticed in the viewfinder</cite>

 

<p>The viewfinder is optical.</p>

 

<p>If you mean the LCD on the back of the camera, I'm not sure that's definitive proof as to what part of the process is defective. As far as I can tell, the camera uses its buffer as a cache. You take a picture, it goes into the buffer, it gets written to the card, but as long as that part of the buffer hasn't been overwritten with something else, any attempt to display that image on the LCD comes straight from the buffer, not from the card*. So even if the card is causing the problem, the image on the LCD could still be fine if you're looking at it shortly after taking the picture. Now, if you scroll back far enough to exceed the buffer's capacity and then scroll back forward to that image, it should have to be reloaded off the card, and <em>then</em> it may show corruption if the card is the problem.</p>

 

<p>*: Why do I say this? Particularly with slower cards, I notice that I can review the last few images that I've shot or viewed very quickly. Once I scroll back past approximately the number of images that the buffer can hold, it slows down (but then scrolling back and forth among the last few images I've reviewed is still fast). I haven't bothered watching to see if there's a difference in the light showing card access. This is on a 20D, but it's a logical way to do things (it makes the camera more responsive when chimping), so it likely applies to many/most/maybe even all other bodies as well.</p>

 

<cite>I download off a card reader into the new iphoto.</cite>

 

<p>OK, you've mentioned one part of your process that's changed since it used to work: new photo viewing/management software. If you use some other software to download and/or view the images, are they still corrupt? Is anything else new since this used to work? Is the camera new or did you previously use this same camera without problems? Same old flash card or new one? Same old card reader or new one?</p>

 

<p>That's a fundamental rule of troubleshooting: if a problem started after you changed something, then while it doesn't prove that what you changed was the culprit, it strongly suggests it.</p>

its really strange I copied the image off the card again and this time it came up normal. I had

a few images do this and the only thing different that I have done is copy the files to a

different machine. I really dident think that can be the problem but now i am thinking its the

computer and not the card at all since it looked fine on the LCD screen and when I re-copied

it to my computer.

 

Hard to replicate this since its random and sometimes it works sometimes I get a banded

image.

I have had similar problems in the past. It was definitely the card reader for me. A new one fixed the problem.