7 Day shop CF, what is the difference.....?

Get the cheaper one, it is their new 'pro' line, which has replaced extreme 3/4, weather sealed and well built, and faster.
 
It's like PC ram. The older stuff hardly anybody uses any more gets the price hiked because it's quit being made, so is "limited availability", but some people need it for compatibility reasons.

The new Extreme & Extreme Pro are UDMA. The older Extreme IV is not.
 
Just compare the DATA RATE on both cards - the older one is

* Up to 40MB/sec*
Click to expand...


The newer one is

WRITE PERFORMANCE: Up to 60MB/s (400x)
READ PERFORMANCE: Up to 60MB/s
Click to expand...


The reason why sometimes older is more expensive may also be because they Bought them "At a price" and they still want to have their margin - the newer ones may be a lesser cost price - so they retain the margin at a lower sale price -

As the convention in naming them has changed many people will "Go" with what they know to be OK for their camera/equipment - so the old ones will sell even though they are more £££:thinking:

Well spotted though all the same:thumbs:
 
Am I correct in the assumption that the new "Ultra" cards are the same write speed as the Extreme III, the "Extreme" ones are slightly faster than an Extreme IV and the "Extreme Pro" cards are faster than anything previous?
 
Extreme III & Ultra == 30MB/sec
Extreme IV == 40MB/sec
"New" Extreme == 60MB/sec
Extreme Pro == 90MB/sec

So, Extreme IV is 33% faster than Extreme III & Ultra
Extreme is 50% faster than Extreme IV
and Extreme Pro is 50% Faster than Extreme

But, there's no body out there, afaik, that can even take full advantage of the Extreme's 60MB/sec, so the Extreme Pro @ 90MB/sec is pretty much overkill as far as the camera's concerned, except for possible future proofing against faster bodies that may come out over the next few years.
 
Thanks Kaouthia. I'm very much considering grabbing a couple of the Ultras at £15, I've currently got a couple of Kingston cards at 20MB/sec and I've never had issues with these regarding speed - just a few compatiblity problems with the camera that mean occasionally it will throw up an error until I eject and replace the card.
The approved Sandisks will hopefully get rid of that :)
 
I've not tried the Kingston ones myself, but I've never had a problem of any kind with Sandisk.

I used 1Gb & 2Gb Extreme IIs in my D100 bodies, 4Gb Extreme IIIs in my D200 and 8Gb Extremes (the new ones) in my D300s, absolutely love it. In fact, the only memory I've ever used besides Sandisk is the 16Gb Integral SDHC card in the D300s that I only use for recording video (no problems with that one either, so far) :)
 
I've got 2 8gig Kingston Pro cards for my D700 and it doesn't like them. THey get a quarter full and the D700 stops reading them. I've used Sandisk since and not a problem
 
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