Given that I cannot find any sandisk 4Gb sdhc cards in the UK it occurs to me that I may not actually need this model. I want to use them as backup cards to me extreme 3 cf cards, shooting to both at the same time. But if my camera only writes at a certain speed, which may be slower than an extreme 3, could i make do with an Ultra 2 sdhc for instance?
It seems to me that write speed of cameras are the important info we are not getting from makers, unless I am missing it.
Can anyone enlighten me?
John
