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Old Mar 26, 2009, 3:14 AM   #1
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Hi guys,

I am looking forward to purchasing a 500D/T1i in May, and I will also grab a SDHC card along with it. Since I am interested in using the video and burst photo modes, I would like you advice on which is better:

4GB SDHC Class 6 (6mb/s) (US$8)

8GB SDHC Class 6 (20mb/s) (US$30)

16GB SDHC Class 6 (10mb/s) (US$30)

Canon say a Class 6 card is needed for recording video, but would I benefit from the extra speed?

Thanks in advance!
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Old Mar 26, 2009, 7:23 AM   #2
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No, there is no benefit - more speed, higher price is FOR THE CAT.

I'm using Transcend SDHC Class6even for Canon SX1 - fullHD 1920x1080 with lonely 43 mbps - and it works perfectly.

Calculate: 43 mbps are 5.4 MBps - why should you need 10 or 20 MBps ?

Other cams/camcorders have for fullhd 12-24 mbps! Cheapest Class6 is always enough!

But you can buy Sandisk and make them rich.


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Old Mar 26, 2009, 7:26 AM   #3
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Personally I wouldn't go with the 6Mbs card as it will likely be borderline. For all my applications be it shooting full HD at 30fps or working with my Canon 1D mkIII shooting 10.1mp at 10fps I use Extreme III cards as I've found the performance to be great, also when I get back to download I'm not waiting for ages so speed is good for all aspects.

In better cards like the Extreme III you are also more likely to maintain good data integrity.
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Old Mar 26, 2009, 10:49 AM   #4
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Mark, did you know - nearly all Class2 / Class4 / Class6 have SAME read speed?

If you do not daily read out 1066.57 gigabytes from your cards there is no significant speed win with Extreme IV or Extreme VII cards :blah:

Using ~ 10 cheap SDHC/microSDHC (with adapter) - extrememory, kingston, Transcend, ... from 4 to 16 gb since years I never losed data.
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Old Mar 28, 2009, 9:47 AM   #5
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I cannot understand why they have chosen to do speeds in this way for SDHC cards!!!!

If you buy class 6 cards, then unless it has the ACTUAL speed on it in MBps, you don't really know what you're getting.

e.g.

SDHC Class 2 means 2-3.9 MBps
SDHC Class 4 means 4-5.9 MBps
SDHC Class 6 means 6-?? MBps

Why not have class 8, 10, 12 etc???? Then everyone knows what they're buying!!!!!


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Old Apr 15, 2009, 12:22 PM   #6
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dnas schrieb:
Quote:
SDHC Class 2 means 2-3.9 MBps
SDHC Class 4 means 4-5.9 MBps
SDHC Class 6 means 6-?? MBps
No. Wrong.

Class2 means 2 MBps guaranteed

Class4 means 4 MBps guaranteed

Class6 means 6 MBps guaranteed

A Class4 card with 8 MBps is faster than a Class6 with 6.5 MBps
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