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Old Jan 18, 2007, 1:57 AM   #1
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the d200 does not support lexar's [wa] technologies,why is this.
regards chas.
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Old Jan 21, 2007, 7:56 AM   #2
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Hi All. Could'nt get a reply to my querie concerning the Lexar Pro 2GB Compact Flash Cards but have checked Steve's Review on the Nikon D200 which states - quote the D200 also fully supports Lexar's Write Acceleration [WA] technology used in their pro series CF Cards. so hope all is well after all as i have two of these cards on order.
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Old Jan 21, 2007, 8:15 AM   #3
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I'd consider the speed of the cards versus something like support for WA. For example, even within camera models that support WA, other card types may be faster.

CompactFlash is continuing to evolve, with faster cards from generation to generation. Chances are, WA support makes little to no difference anymore.

In most cases, the camera is going to be the bottleneck writing to any flash media. IOW, the speed of the camera's processing and interface to a CompactFlash card is going to limit how fast images are being written to a card.

That's why you will get significantly faster write times to media using a good card reader compared to how fast a camera can write to a card. Once you get to a certain card speed, you tend to see diminishing returns.

A good source of information for write speed to media is Rob Galbraith's web site. He tests popular CompactFlash cards in some of the popular DSLR models. The fastest cards in this model are the newest Extreme IV cards from Sandisk.

But, there is *very* little difference between the better cards in this model, with none of them testing anywhere near as fast in the camera as they do in a Card Reader. The camera is the bottleneck (although this model is faster than the older generation Nikon DSLR models).

Also, unless you fill up the camera's internal buffer (and the buffer in the D200 is quite large), you won't see any difference in the speed of operation with the camera. IOW, you could use the slowest card on the market and your cycle times would be just as fast as they would be using the fastest card on the market, unless you took enough photos in a row to fill up the buffer. Only with a full buffer would you see any difference (since the camera would have to slow down to the speed it's able to write to the media at that point). The camera can buffer around 30 JPEG Images or 20 RAW images. If you're shooting sports using continuous mode it might be a factor. Otherwise, you probably wouldn't need a faster card.

The D200 tests are here:

http://www.robgalbraith.com/bins/mul...?cid=6007-8197

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Old Jan 21, 2007, 8:38 AM   #4
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Hi Jim. Thanks for your speedy in depth reply. Best Wishes Chas.
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