Third time’s a charm: Sony Cyber-shot DSC-RX100 III Review

tl;dr: Sony should not *require* SDXC cards for XAVC-S video, and instead allow UHS-1 SDHC cards to work…

I currently own the RX100m2, and I’m really looking forward to upgrading to the m3.

However, I’m quite turned off by Sony’s requirement that one use SDXC cards when recording XAVC-S video — more importantly, I totally fail to understand it from an engineering standpoint. Perhaps I’m missing something, and I’m hoping this article’s author or others might clarify.

Technical specs of most top SDHC and SDXC cards from Sandisk, Lexar, etc, show that there is no read/write throughput advantage to the SDXC over the SDHC. Indeed, a UHS-1 or better (45MB/s or 95MB/s or 400x or 600x…) card is the same throughput whether it be a 32GB SDHC or a 64GB SDXC. In fact, most of these levels of throughput are *far* more than one would require for the max XAVC-S codec, anyway, which is 50Mb/s (note that this is 50 MegaBITS/sec, or about 6 MegaBYTES/sec).


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