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EOS 600D - which SDHC card

Mike Hitchen , Mar 12, 2011; 04:27 p.m.

My wife has just bought a 600D (T3i) and we are wondering what speed SDHC card it needs for maxiumum performance shooting stills (3.7Mb/sec at 18 megapixel RAW).
She has a Sandisk Extreme HD video card (30Mb/sec) apparently it is a Class 6 card. The 30mb/sec would suggest to me a speed of about 1.8 frames/sec (30MB divided by 18MB) - or do the maths work differently to that? I have had a look on the net for information about SD cards for the similarly-specced 550D but can't find anything.

Any help appreciated!

Responses

Mark Kissel , Mar 12, 2011; 04:45 p.m.

Canon recommends a Class 6 or higher for this camera. I tried a Class 4 but it could not keep up with the video. Bought a Class 10 and it works great.

Mike Hitchen , Mar 12, 2011; 04:58 p.m.

Thanks, Mark.

I have just re-checked the Sandisk website and it refers to 'Class 6 video performance'.
So a follow up question is whether there is any difference between a SD card and a 'SD HD video' card. It counds like a marketing ploy to me. Or am I being overly cynical?

Richard Tully , Mar 12, 2011; 07:02 p.m.

I use Adata SDHC Class 10. Price is right and they work very well. Have not tried SDXC and since I now have a 7D will not be buying more for my backup T1i.

Mark Kissel , Mar 12, 2011; 08:16 p.m.

Mike, I'm not sure what a SD HD card is, other than a regular SDHC. You're probably right about the marketing thing since buzzwords like "3D" and "HD" are popular in the video industry right now.

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