B&H lists the Sandisk Ultra II 4G SDHC card as being a 60x card against the 150Kbps=1x standard, same as the other Ultra IIs.
G On Dec 21, 2006, at 10:29 AM, John Francis wrote: > ... I must admit, though, that it's not easy to do comparisons between > the speed of the cards - SDHC introduces a new speed rating system. > I believe that in the old rating a "1x" card could transfer data > at 150k bytes/second. That means that an 80x speed rating would > be equivalent to a transfer rate of 12MB/sec. (A quick back-of-the > envelope check validates this; the K10D is reported to be able to > shoot about one (17MB) RAW file per second in a sustained burst, > which matched up quite well with it's reported ability to make use > of cards rated at 133x or 150x). But the Transcend 8GB SDHC card is > only rated as an SDHC Class 2 device (which appears to only require > transfer speeds of 2MB/sec, from how I read the SDHC specifications). > Similarly the Toshiba 8GB SDHC card (the first one that claims to > meet the SDHC class 4 requirements of 4MB/sec) reports much higher > transfer rates in their press release - they claim 20MB/sec, which > is equivalent to 133x under the old SD speed rating system. > > Are you as confused as I am? -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
