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

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.
Brand: SanDisk Model: SDCFX4-2048-901 Dimensions: 1.00 pounds
As the leader in high-performance flash technology, SanDisk introduces the newest flagship products – The Extreme IV line of CompactFlash. The Extreme IV line of CompactFlash is our newest digital film cards for the high-end professional photographers, who require the highest possible performance and the largest capacities for their medium format and high-end digital single lens reflex (SLR) cameras. It has extremely fast read/write speeds. (Up to 40MB/sec) It provides the highest durability, speed, and quality demands on the market today for serious photography. The reason for the extreme fast read/write speeds is that the Extreme IV memory cards feature innovative ESP ("Enhanced Super-Parallel Processing") technology for the fastest speeds and highest performance. You get the fastest read/write speeds available today – up to 40MB/sec sequential read and write speed. SanDisk also introduces the new SanDisk Extreme FireWire reader. Combined with our new Extreme CompactFlash cards, images can transfer from the SanDisk Extreme IV cards to a computer, at up to 40MB/sec, for significantly improved workflow efficiency. Every SanDisk Extreme IV CompactFlash card comes with RescuePRO Deluxe so you can recover images, documents, mail, video, music – just about any digital file, with ease. Built with leading-edge media recovery algorithms, RescuePro Deluxe lets you preview recoverable data before you try to retrieve it. With RescuePRO's unique recovery algorithm for MPEG audio and MPEG video recovery (MPEG-1/2/3) what you see, and what you hear, is what you can recover. Extreme IV is the new industry leader in the best-in-class solution for high profile professional photographers. As the elite flash memory cards available on the market, Extreme IV has extremely fast read/write speeds. This line provides the durability, high-speed, and quality demands for serious photography. SanDisk's award-winning technology solidifies the strength of the Extreme IV family of high-performance flash cards. Advanced Features: Designed to meet the critical speed and performance needs of serious professional photographers. Significantly improved workflow efficiency for capturing, viewing, upload and transferring large image files Ideal for demanding photo shoots under severe weather conditions—heat, cold, wind, rain, snow, etc. Built to perform in the most extreme environments and temperatures—from -13º F to 185º F Up to 40MB/sec sequential read and write (leveraging the new Extreme FireWire Reader) Durable, reliable and thoroughly tested—temperature tested (heat and cold); shock and vibration tested Data recovery software—ensures your photos will always be there (even if you delete them accidentally) Dedicated, priority technical support hotline for direct customers of SanDisk Extreme products Included travel case keeps your memory cards organized Lifetime limited warranty
Speed surprisingly beneficial to camera performance 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. that's fast! Added this Extreme IV card to my collection of Extreme III cards used in my photography. Works without a glitch. I set my camera (Canon 20D) on continous shooting, full RAW, aimed it at a visually busy scene, and held the trigger down. It stopped to complete writing somewhere around 8 frames. I'm pleased with that. Very Fast This product was purchased along with a Canon 40D DSLR. This combination has proven to be extremely fast. I notice no delays when shooting with this card. This by itself is probably of little relevance though as the camera is likely the slower of the two pieces of hardware (Canon doesn't spec it's transfer rates). It does make a huge difference however when uploading to the computer for backup/editing purposes. This memory flies when used with the SanDisk Firewire card reader!!! Cons: Very expensive considering even the cost of the last generation of SanDisk.

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