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PostPosted: Fri Sep 03, 2010 11:31 am 
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Joined: Wed Oct 29, 2008 5:46 pm
Posts: 555
Location: Sheffield
Ive read somewhere that class 6 will be ok, but cant find any other info to find out which class i need?
i dont want to fork the money out for a 8gb sdhc Class 6 if the camera can only buffer at class 4.

any help is greatly wanted,

thank you


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 Post subject:
PostPosted: Fri Sep 03, 2010 3:08 pm 
Hi Neil. It kinda depends on what you do with your camera.

Do you shoot in RAW or use continuous mode?

If not then Class 4 should be fine.

 Post subject:
PostPosted: Sat Sep 04, 2010 8:51 pm 

Joined: Sun Jul 04, 2010 4:52 pm
Posts: 244
Location: NB, Canada
Also, if you want to film videos and take images at the same time, you'll need to dish out even more dinero and go with a class 10.

Cameras: Canon EOS 6D, Canon EOS Rebel T3i, Canon EOS Rebel T2i, Canon S90
Lenses: Tamron: SP 24-70mm F/2.8 Di VC USD, SP 70-300mm F/4-5.6 Di VC USD, Rokinon: 8mm Fisheye cine, Canon: EF-S 18-55mm f/3.5-5.6 IS Lens, 75-300mm f/4.0-5.6 III, and EF 50mm f/1.8 II
Retired camera: Fujifilm Finepix s700

 Post subject:
PostPosted: Sun Sep 05, 2010 2:07 am 
The class rating is a load of BS imho.
I have class 4 cards that outperform class 6 cards, so you can't trust the rating.
Also, I've found that some cards don't work well in cameras for whatever reason, despite working well on the PC when tested at read/write speeds of close to 20MB/s, yet in my 500D I can't record more than a few seconds of video and then the camera stops.
Toshiba makes good cards imho and I'm using a SanDisk 20MB/s "HD Video" card now as I got a good deal on one. It's only a class 6 card, yet it perform better than the class 10 spec. However, it doesn't meet the 20MB/s rating on the card, although I guess 19MB/s isn't too bad.

 Post subject:
PostPosted: Mon Sep 06, 2010 11:53 am 
The class rating simply refers to the minimum guarenteed write speed of the card. A Class 4's minimum write speed will be 4Mb/s, a Class 6's minimum write speed will be 6Mb/s.

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