When I got my Nikon D700, I also have to upgrade my collection of CompactFlash cards (CF), because when I used a Nikon D70 camera, and I used my 4GB CF card, I could get about 750 RAW images down on it - I do not know how many JPEG images there was room for, because after I changed to RAW, I have not used otherwise.

The only problem with my 4GB CF card when I use it in my D700 camera, there's only room for 155 pictures (RAW quality is also changed from 12 to 14 bits), and since I can easily come home from a photo session with 300 + pictures I needed a new card.

After looking for the right card, I chose a Lexar Professional UDMA 8GB card and bought while a Lexar Professional UDMA card reader. It has space for 302 pictures, and I can have my 4GB and my two 2GB cards. So I have space for about 600 RAW beetle before I run out.

So I set out to test the speed of my cards, and simultaneously to see if UDMA is actually faster than normal cards. My first impression (when I wrote this post a year ago) was to the camera and you shoot loose it does not mean much, but when you have to import the pictures into your computer, it has great effect.

Update
Since I wrote the original blog posts a year ago, I found that I was wrong. The speed is definitely something to tell the camera is also quicker to empty its buffer in the camera, the faster you are ready for a new series.

I looked for various benchmark software but finally wrote my own little program that copies the contents from one folder to another - Quite simple. I put the same files on all my cards, 68 images in RAW but a total size of 906MB (950,123,581 bytes) and copied them directly into a folder on my computer.

Here are the results of my little test:

As you can see, you use the nameless reader's speed pretty much the same no matter which card you use, but you change the UDMA card reader, you get an entirely different speed.

When I originally posted this post in English (for exactly one year ago) came Uffe with a comment:

And we can add the following to the list:
Transcend 16GB 300x Compact Flash High Speed ​​Card

Have the following speeds:
Lexar Professional UDMA card reader ~ 30MB / s
Built-in reader in a Dell Dimension desktop computer ~ 9.5-10.0MB / s

And can conclude that the Transcend card does the Lexar UDMA card in a UDMA reader, and that the built-in reader in my Dell is no better than the card reader without a name.

Next test is the speed of the camera, to test how fast the buffer is emptied onto the cards.