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Old May 18, 2010, 4:12 PM   #1
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Default SDHC card advice for Sony DSC-TX7

I'm getting a Sony TX7 sometime this week. I've been doing some research on which SDHC card to get.

Sony claims that the TX7 will work with Class 4.


When using movie mode Memory Stick PRO Duo with MARK2 logo, Memory Stick PRO-HG, Class 4 or higher for SD/SDHC/SDXC media are recommended.
Now, take a SanDisk Ultra II Class 4 for example, it's rated at 15 MBps.

The TX7 will do AVCHD 1920 x 1080 @ 17 MBps. I'm not an expert on photography storage but how can a Class 4 work efficiently on the TX7?

Am I missing something here?

The TX7 can also do burst @ 10fps/10.2 MP

Now, I could go for a SanDisk Extreme III Class 10 but I could also go for cards such as the Lexar Professional Class 6 SDHC and the Transcend Class 6 SDHC which have performed reasonably well in testing and are better value.

Question, is the Extreme III worth the extra cost?

I know I'm just buying a compact but I would like to get the most out of it.

I appreciate your suggestions.
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Old May 18, 2010, 6:17 PM   #2
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An SDHC Class 4 card is fast enough to continuously record unencoded HD Video until the card is full, but not HD Video and audio simultaneously. For that, you'd need a Class 6 card. But the TX7 stores encoded (as in, compressed) HD video and audio, and so should work fine with a Class 4 card.
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