40D RAW capture problems

[Redback51]

Good evening all...I write this because I am all of a sudden having problems capturing raw images when using exposure bracketing. My camera's set for medium jpg and large RAW images.

For a number of years I've been using a 4GB SanDisk CF card and recently upgraded to a 16GB card (simply because I was going bush for a few weeks and needed the extra storage). I never had a problem using AEB with the 4gig and, initially, none with the 16gig. But then I noticed that only the occasional RAW image from a bracketed exposure would download and then finally, none at all. The RAW files appear to have been replaced with a file with a .JPG extension (as distinct from .jpg). So, what I generally get now with a bracketed exposure is three .JPG files instead of RAW files, and three .jpg files.

One other thing that's also been happening in association with the lack of RAW images is that, at times, the 3-burst capture takes an inordinate amount of time to download to the card.

The battery is new, being bought at the same time as the 16GB card.

Everything else is per how I've been using the camera since I bought it new.

Any clues what's happening? Any advice on how to fix would be gratefully appreciated.

Cheers :food04:

[farmmax]

You didn't buy a much slower 32GB card than your 4GB card did you? I'd be surprised, as cards are getting faster and faster. What speed are they? If you go back to your old 4GB card what happens?

[Redback51]

Thanks farmmax...the 4GB is 30 MB/s; the 16 is 120 MB/s. I haven't, as yet, tried again with the 4GB...will be doing so on Thursday.

Cheers :food04:

[nardes]

Sorry to hear of your problem. As general advice, when faced with “out of the blue” problems such as this, I would do the following:


Make a note of any settings you have changed and want to keep.
Reset the Canon 40D back to factory settings.
Re-format the 16GB CF card in the camera.
Check to see if that has fixed the problem.
Re-apply any changes you have made.


At least then, you would be starting from a known baseline. Good luck!

Cheers

Dennis

[Mary Anne]

Good advice from Dennis above, returning to Factory settings works for me when I have problems I hope it works for you.

[Redback51]

Greatly appreciated Dennis and Mary Anne...will give it a try first thing tomorrow and report back. Cheers :food04:

[Redback51]

Thanks folks, things appear to be working OK and after spending a couple of hours on the phone with a really helpful Apple person, I think I've got the Mac side of things sorted out (photon-wise) as well.

Cheers :food04: