Hoodman RAW 4GB, 300x High Speed UDMA Compact Flash Memory Card, Supports up to 45MB per-second Transfers

Raw speed is what you get from Hoodman. 45MB per second. Built in the USA. Lifetime Warranty. Lead Free. Sold only at your photo dealer. Yes, Raw Costs a bit more, Hoodman is betting your photography is worth it. RAW CompactFlash in 2GB, 4GB, 8GB and 16GB capacities utilize UDMA. Investing in RAW will give your current camera and future cameras the opportunity to perform at their highest levels.• UDMA = ULTRA DIRECT MEMORY ACCESS what's in it for photographers?
UDMA is a protocol developed by Quantum Corporation in conjunction with Intel that supports burst mode data transfer rates. You might be wondering what is a protocol? A protocol is an agreed-upon format for transmitting data between two devices. There are a variety of standard protocols from which programmers can choose.• Each protocol has advantages and disadvantages; for example, some are more simple than others, some are more reliable, and some are faster. From a user's point of view, the only interesting aspect about protocols is that your computer or device must support the right ones if you want to communicate with other computers. The protocol can be implemented either in hardware or in software.

What does a UDMA CompactFlash card do for you?
A UDMA memory card dramatically increases card-to-computer transfer rates when paired with a UDMA-enabled reader (Hoodman's RAW) UDMA memory cards will download 2GB of data to your computer in just 60 seconds via a RAW FireWire UDMA enabled reader from Hoodman. If you are a USB 2.0 person, the same 2GB of UDMA data will download to your computer in 2 minutes via a RAW UDMA USB 2.0 reader. Hoodman's RAW UDMA readers are backwards compatible with non-UDMA CompactFlash cards.

How do UDMA cards work in non-UDMA cameras?
UDMA CompactFlash cards are backwards compatible with all Digital SLR cameras designed for CompactFlash cards. The UDMA cards will max out the performance of your non-UDMA camera and give you the dramatic increase in card-to-computer transfer rates described above a huge time saver.

How do UDMA cards work in UDMA cameras?
To date: the Nikon D3, Nikon D300, the Canon 1DS Mark III and the Olympus E3 are the new cameras which utilize the new UDMA protocol. UDMA cards are designed to maximize the performance of these new cameras.

Can I use my old CF cards (non-UDMA) in a UDMA camera?
Yes, you can use your non-UDMA cards in the new UDMA cameras. You will not maximize the performance of your new camera by using a non-UDMA card and you will have to spend a lot of time waiting for your slow cards to transfer data to your computer.

Are UDMA cards more reliable?
Hoodman RAW UDMA cards have had ZERO in field failures since their launch in January 2007. Hoodman RAW is the only CompactFlash card built in the USA. Hoodman RAW is the only CompactFlash card sold exclusively through Professional Photo Dealers. Yes RAW costs a bit more, Hoodman is betting your photography is worth it.