SanDisk 16GB Extreme Pro CF memory card - UDMA 90MB/s 600x (SDCFXP-016G-P91, Retail Package) Review

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(More customer reviews)If you're taking photos of little Suzie holding up her spelling bee award then you don't need a fast CF card. If you're shooting sports photos, though, that speed is the difference between staying in business or putting your gear for sale on eBay.
Here's an example: I shoot world class track & field. With the older "slow" cards it would take my camera 42 seconds to write the 21 RAW images from the buffer on to the card. While that may not be a problem for most people, if I were shooting Jeremy Wariner who's running his 400 meter race in just 43+ seconds then I need to worry.
With these super fast cards it now takes my newer camera only 6 seconds to write the 28 images in the buffer.
No grey hair and eBay doesn't get my business.
Fast cards are nice and these cards are fast.

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Now there's a memory card fast enough to keep up with your advanced DSLR: The SanDisk Extreme® ProTM CompactFlash® card. With lightning-fast (up to 90 MB/s* write) speed, you'll be able to capture more continuous burst shooting-and get the most out of your professional digital SLR camera. And with 16GB of storage, you'll be ready for more RAW+JPEG and high-def video.SanDisk engineered its Power CoreTM Controller to take whatever your camera's buffer can dish out. By distributing image data across the card more rapidly and efficiently, this card delivers professional performance.

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SanDisk 16GB 60MB/s Extreme Compact Flash Card SDCFX-016G-A61 (US Retail Package) Review

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(More customer reviews)I started in 2005 with the Ultra II series and have continually sold & upgraded as my needs dictated. I'm now using a Canon 5D Mark II which has HD video (I think we all know that by now), but the camera also creates a 30mb RAW file every time I snap the shutter. So, write speed is very important. I WAS using the Extreme IV series cards (45mb/sec), and even with the slower 4fps in the 5D2, the camera would hang after a few shots to write the data. Now with these new 16gb Extreme cards I get to hold down the shutter button and record WAY more images before the buffer starts to hold things up. What an improvement! This new series is worth every dollar. Remember, faster cards also give you longer battery life since the data writes faster, so that's another plus to these new Extreme cards. They are UDMA level 5 which is nice (the 5D2 handles up to 6). BTW, UDMA simply means that the card does a lot of the file processing, which gets you faster write speed. Non-UDMA cards make the camera do all the work when writing images to the card. If you have a UDMA-enabled camera, by all means get UDMA-enabled cards.
One last thing to help clear confusion on the card naming format: the 133X and 300X and all that simply means the speed that the card can write data. SanDisk doesn't use that prominently in their marketing, they tend to say "30mb/sec" or "60mb/sec", like that. Lexar uses the ###X format all the time. So when shopping around, keep this in mind:
SanDisk Ultra II: 15mb/sec (the original version) - Lexar calls it 100X (this older model is NON-UDMA)
SanDisk Ultra II: 20mb/sec (the updated version) - Lexar calls it 133X (this older model is NON-UDMA)
SanDisk Extreme III: 30mb/sec (the original version) - Lexar calls it 200X (this older model is NON-UDMA)
(Thanks Uri for the correction in Comments!)
SanDisk Extreme IV: 45mb/sec - Lexar calls it 300X (The SanDisk Ducati line is also 45mb/sec and UDMA enabled)
SanDisk's New Extreme: 60mb/sec - Lexar will call it 400X
SanDisk's New Extreme Pro: 90mb/sec - Lexar will call it 600X
Hope that helps understand all of this!
UPDATE (12-29-2009): I also wanted to mention that I've owned nearly 15 SanDisk CF cards since 2005 and I have never had ONE fail on me. I learned a trick from a pro: after you COPY (not MOVE) your images onto your PC, always format the card IN-CAMERA before you shoot again. Don't use Windows to delete your images off the card. The CF cards get grumpy for some reason (no matter what brand you use). I've shot 20,000 images on four different camera bodies, and never one card failure in four years.

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Sandisk Extreme SDCFX-016G-A61 CompactFlash (CF) Card SDCFX-016G-A61 210

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