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"RE: SDHC versus SDXC in D7100?"
I think you're mixing up your terms. The SD designations of HC and XC have to do with file size and card capacity.The speed ratings would be the old x-rating and newer Class rating and UHS speed class.Nether the less, perhaps you might find this posting at Dpreview of some experimenting someone had done.If my quick scan of the information is accurate, the D7100 will benefit from the faster Class cards.Pete
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