SanDisk Extreme IV - Flash memory card - 16 GB - CompactFlash Review

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(More customer reviews)This is my first 16GB card. Previously I have stuck with cards no larger than 8GB, mainly because they are easier on the wallet (though the argument can be made that the 16GB cards are cheaper per GB) and because I am uncomfortable with such a large number of photos being housed on one card. Even with the 5D Mark II RAW files, we're talking 500-600 photos on a card, and with a single failure all of those photos could be gone. I don't mind carrying around a few more cards if I can minimize the lost data if this ever happens to me.
But between a few Extreme III 8GB's, some Ultra II 8GB's, a couple of Lexar Pro 300x 8GB's, and a handful of Extreme III and Ultra II's between 256MB and 2GB, I have not had a single failure on any card yet, knock on wood. And I was about to embark on a photo-heavy trip with the 5D Mark II, so I ordered the 16GB before my flight, to add to my existing stash.
This is a seriously fast card. As has been mentioned, according to the testing done by Rob Galbraith this is the fastest 16GB CF card out there, tied with the Lexar Pro 16GB in RAW transfer speed, and 1MB/sec faster than the Lexar in JPEG transfer speed. It tests slightly faster than my pair of Lexar Pro 300x 8GB cards in RAW transfer, but in real-world terms there is no noticeable difference.
If you're upgrading from Extreme III's, you'll notice the difference: it's on the order of a 25% speed increase. Upgrading from the Ultra II's? That's somewhere around a 350% speed increase over the 8GB Ultra II!!
If you can afford it, get it. You won't be disappointed.

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Finally, a card that can keep up with you! With a blindingly fast read/write speed of up to 45MB/second and a remarkably rugged design, the SanDisk Extreme IV CompactFlash memory card takes digital photography to a whole new level. No wonder professional photographers around the world have made SanDisk their preferred choice for high performance, reliability, and proven durability.

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SanDisk 2 GB Extreme IV CompactFlash Card ( SDCFX4-2048-901 ) Review

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(More customer reviews)PRO: Very Fast, Allows more continuous shots without filling buffer
CON: Expensive
The SanDisk 2 GB Extreme IV CompactFlash Card is so fast, when I held down my shutter release (with Rebel XT set to Raw) for 3 fps continuous shooting, 30 seconds later it was still firing (it may have gone longer, but I just gave up and took my finger off the button). The Rebel XT is only rated for 5 or 6 Raw frames at 3 fps. Apparently, this 40 MB/s card clears the buffer faster than the pictures can fill it up. I also feel very confident that I can take multiple shots in succession even while the camera is set to both Raw and Large/Fine JPEG (at the same time) without worry that the camera will be busy writing to the card. On one outing, I took 101 JPEG pictures (approx. 3.3 MB each) and uploaded them to my PC via the Sandisk Firewire card reader in less than 30 sec (est.). Note that you probably will need the Firewire reader to get the full 40 MB/s upload speed (from your card to your PC). This card costs a bit more than the Extreme III, but it gives a very comforting level of performance overhead.
CONCLUSION: Best memory card available for DSLRs. Worth the money. Get the Firewire card reader if your PC has one of the two provided Firewire plug types. The Firewire connection on the front of my PC was not compatible, but the back one was.

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As the leader in high-performance flash technology, SanDisk is introducing the newest flagship product specifically designed for medium format cameras with a digital back, targeted at the high-end professional photographers, for the Americas Photo channel. Extreme IV has extremely fast read/write speeds. This line provides the durability and high-speed quality demanded for serious photography.SanDisk's award-winning technology solidifies the strength of the Extreme family of high-performance flash cards. It provides your customers the full line of SanDisk digital imaging products, from our entry-level blue label through this newest edition of our Extreme IV products.The Extreme IV CF card has the fastest speed available today, in a brand name you can trust.

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