Camera Storage Cards

I bought a new camera (a Lumix DMC-TS5), which takes an SD card for storage.  The manual says that it needs an SD Card with a rating of "4 or better" (to take videos), and that cards between 4-32 GB need to be SDHC.  I have a couple of old SD cards that are 16 GB, rated 8, but are titled "VideoHD" rather than SDHC.  Two questions:

1.  Is a "VideoHD" the same as SDHC?

2.  The newer SD Cards are rated 10.  What's the difference between a rating of 8 and 10?

Thanks,

Phil
philsimmonsAsked:
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regmigrantConnect With a Mentor Commented:
SDHC refers to the high capacity form factor - if your camera needs SDHC for  cards more than 4gb then it might have a problem using the extra space on an SD card (SD card use the Fat32 file system) - but it wont harm to try it (other than potentially not getting the shot you are trying to take).
 VideoHD is for marketing and indicates they are 'optimised' for HD video (the level of optimisation is doubtful). The Rating refers to the speed of transfer, you are unlikely to notice a difference between 8 and 10 until the buffer fills and the camera has to wait until data is transferred to the card this will occur more quickly for a faster rated card allowing longer continuous shooting of stills.

here's an article to help explain
http://www.whatdigitalcamera.com/techniques/features/profiles/433688/sdhc-cards-explained-secure-digital-high-capacity-cards.html
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philsimmonsAuthor Commented:
Thank you!
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