CAPhotog wrote in post #16382841
I think it is more that SD cards have a guarantee about water but CF cards do not. This info was given at two unrelated workshops, one was a Canon 5D III shooter, the other shooting different Nikon models.
Just note that world-class photographer doesn't mean world-class engineer.
Was surprised myself. By the way, I'm labeling their work as photojournalism because they travel on assignment and shoot on location for extended period which were the scenarios they mentioned for water concern. Apparently the reason is because the controller is built into CF cards and not SD cards.
That doesn't really matter. Both SD and CD needs to have electronics inside. There isn't a significant difference in environmental sensivitivity of the controller chip compared to the memory chips. And there isn't a significant difference in how well you can seal the electronics of a SD or CF card.
The only real difference is that you can use cloth and dry the contact points of a SD card, while there are no good method to dry the pins of a CF card - so the CF card would need more time to try up before you insert it into a reader.
One referenced the manufacturer, I think it was Sandisk, guarantees the SD card is waterproof for 72 hrs but does not offer the same guarantee for CF cards. Just checked online and appears to be correct. Additionally, someone asked if SD cards are too slow, but it was pointed out there are faster ones now so performance is relative.
One issue here is that manufacturers only certifies products when they see a significant advantage of doing it. This means that there are lots of uncertified products that are behaving great despite not having any official stamp on them.
It isn't easy to get controller-less cards to match the fastest cards with internal controller. This because the internal controller can do tricks that requires extra data transfers if done externally.
What we want is memory cards using the SATA-600 specification, allowing us up to 600MB/s of raw transfer rates. But SATA - just as the original IDE standard that was part of the original CF design - is a solution with controller in the device.
Speaking of durability, did anyone see the test DigitalRev did with a Canon 7D? Some gear is definitely robust even if not meant to be used under such conditions.
Lots of equipment is quite robust. But the big issue is how they behave long-term, i.e. if they age well. When web sites does abusive tests, we would like to see one-year-after tests too, after the test subjects have been returned to normal, and regular, use after abusive tests have been performed. http://youtu.be/RCT-YMgjm9k
Don't take a photographers word for it.