My buddy & I are planning a photo tour starting in New England & heading SoWest to the Cactus Forrest near Tucson, then heading Northerly to Sedona, Grand Canyon, Grand Staircase-Escalante, Mesa Verde, Badlands in SD, Grand Tetons, Yellow Stone, Glacier NP, up the Rockies into Canada for Jasper & Bannf NPs before turning Easterly back across Canada to New England.

Looking for suggested sights along those routes that might include great Rt 66 sights, old trains, old cars or motorcycles, wildlife or other photo opportunities along the way.

I will spend a day at the South Rim of the Grand Canyon in March. I have read several older posts on the subject and received good advice on filters: circular polarizing and neutral density. A post recommended a wide angle lens, but did not mention a specific lens. I have a Nikon D750 and I will take my Nikon 50mm 1.8G, Tamron 24-70mm 2.8 and Nikon 70-200mm 2.8 VR. My question is would the 24 -70mm be wide enough? If not, any suggestions. Any other advice or suggestions would be appreciated. Thank you.

Yes. Be aware that the certificates that came with my latest two San Disk cards were for a two-year subscription for the recovery software. So I am planning to hold on to them until needed, rather than downloading and activating immediately. I would hope that the need for recovery would not occur within two years.

It would be interesting to discover whether the San Disk software will work on cards made/sold by others or if it is keyed in some way to San Disk products only...

Perhaps someone who has already downloaded and installed can let us know.

I'd suggest using a card reader, or a different card reader; they're cheap. Some plug directly into a USB slot, eliminating cable disruptions (though I use a short USB extension cable for ease of insertion). Get a magnifying glass and check the pins in the card reader; I have bent a pin when I was using CF cards. You can try and straighten with a pair of sharp tweezers, or a micro screwdriver, but easier to buy another reader.

Finally, if windows, use TeraCopy, freeware, with details and verify options enabled. You can see the progress; if a file has a problem, the copy continues, with error report at end. The verify ensurs an exact copy was made.

Stumbo, Recuva and Photorec are two windows freebies that have absolutely performed miracles for us over the years; O&O has a paid program that we own, and it's worth the expenditure. We Sandisk, Samsung cards and, always make sure the camera is off prior to opening the card door, offloading the shoot, then reloading the card. In a pinch if the card isn't over 1/4th filled, downloading via USB 3 has always worked, but your battery will always take an unnecessary power drain. As long as your work is backed up on at least two separate drives, you should always reformat your card in the camera. Good luck and happy shooting. sv

Exactly how are you downloading the images to your computer?

Are you removing the card from the camera and using a card reader or are you downloading from the camera via a USB cable?

Are you using some app to download, or simply using your computer's operating system to copy the files onto it?

Do you regularly format your cards in-camera?

It's rare for a card that's worked in the past to suddently "become corrupt". Memory cards are solid state, so there isn't much to "go bad".

Most likely is a problem with connectivity between card reader and computer or between camera and computer (depending upon what method you're using). Have you changed anything lately? Using a different card reader or have it connected to computer differently, for example.

It also could be a failed USB cable, if tethering the camera to the computer to do the download. Or it could be a bad USB socket (on camera or on the computer).

If you were moving the images off the card while still in the camera and the battery was low and the camera had to shut down, the interruption could corrupt the files. (One reason not to download from camera, but to instead use a card reader. It also lessens the risk of damage to the USB socket of the camera, which is likely to be expensive to repair because most are part of the camera's main board... replacing a memory card socket is usually less expensive: easier to get to, less labor, and it's a modular sub-assembly on most cameras, so replacement parts would be cheaper, too. It's also a good idea to copy images off the card, rather than move them. That leaves the originals in place on the card, in case there's any problem with the download.)

As mentioned in a previous response, it also could be a damaged memory card socket in your camera. Remove the memory card and inspect the pins at the bottom of the socket. Also look closely at the connection end of the memory card itself... for any sign of damage or a broken pin stuck in it.

You should work through each of these possibilities... substituting a different card reader, using USB cord instead or substituting a different one, etc.... testing each in turn to rule out the various possibilities and try to identify the source of the problem.

The 1 or 2 in the upper right corner tells you the source card number being displayed. See explanation & diagram on page 252 of your manual. Given you have the corresponding JPEGs, I'd hesitate to spend any money on a card recovery before being very thorough in confirming the card is the actual problem. I'd also always confirm the camera display is set to card 1. After removing and replacing the CF card, always take a moment to specifically review this icon and reset the display, if needed.

What happens when you change the display to card 1 via the camera menus? See page the Set-up menu and / or page 120. Does the camera think there are any images on the card?

Of course any technology can fail, but CF cards are pretty far down the list of common / possible causes. For example, what happened when you connected the camera to the computer via the USB and navigated to the CF card? Can the computer OS see the card? Can you see the contents of the card? Are there CR2 files on the card?

The EOS 5DIII won't capture images if it can't write images as configured via the menus. If you've configured the camera to write RAW to 1 and JPEG to 2 and the camera cannot write files in these formats to the two cards, it won't write at all. Is the camera configuration exactly as you've described? Pages 117-122 show the applicable menus to confirm the configuration you've described. The LCD in the top of the camera also tells you the card configuration. See pages 21-22 of your manual for details.

If the camera will record and playback images on card 1, you should be able to download them. If you insert another CF card, what happens when you capture a few images?