SD Card Classes


Jan 31, 2010
195
0
0
#1
Hello all,

No matter how I search, I'm still feeling uncertain of the information I've found and like to ask if anyone could point out any mistakes in my understanding of this.

Basically, SD Speed Class is the guarantee of minimum speed (i.e. Class 2 = 2MB/s).

However, Cards like Sandisk Ultra advertise 15MB/s is only a maximum read speed, and write speed still guarantees only at its class range (Class 4 in Sandisk Ultra's case).

So Speed Class is a stringent guideline on the minimum possible transfer speed, am I right?



Erm I'm using the GF-1, and reading its guidelines it says when recording HD movies, it is "recommended that you use a high-speed card of "10MB/s" and above".

If that's the case, only a class 10 card is able to record HD movies? (Like Sandisk Extreme)

I don't want to spend money unnecessarily on a high speed card... Afterall the GF1 only bursts a maximum of 3 shots/sec... nothing a Class 4 can't handle...



Thanks in advance for all your help and advice.
 

hotwork77

New Member
Jun 21, 2009
1,353
0
0
1°19'37.70"N 103°47'39.19"E
#2
Hello all,

No matter how I search, I'm still feeling uncertain of the information I've found and like to ask if anyone could point out any mistakes in my understanding of this.

Basically, SD Speed Class is the guarantee of minimum speed (i.e. Class 2 = 2MB/s).

However, Cards like Sandisk Ultra advertise 15MB/s is only a maximum read speed, and write speed still guarantees only at its class range (Class 4 in Sandisk Ultra's case).

So Speed Class is a stringent guideline on the minimum possible transfer speed, am I right?



Erm I'm using the GF-1, and reading its guidelines it says when recording HD movies, it is "recommended that you use a high-speed card of "10MB/s" and above".

If that's the case, only a class 10 card is able to record HD movies? (Like Sandisk Extreme)

I don't want to spend money unnecessarily on a high speed card... Afterall the GF1 only bursts a maximum of 3 shots/sec... nothing a Class 4 can't handle...



Thanks in advance for all your help and advice.
From experience Class 4 is more than adequate. However, why stop there? I use SanDisk Class 6 SDHC 8GB which is available from SimLim for $35.

Class 4 can handle all photo shots cos the SD card can clear the traffic. When you take video, the cache memory in the camera will clog up pretty fast. Using a Class 6 is like taking a middle ground. Fast enough for photo and somewhat slightly below average for video.

I use the same Class 6 for my HDV camcorder and it can still kick some dust.
 

grabejud

New Member
Oct 9, 2007
342
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0
#3
From experience Class 4 is more than adequate. However, why stop there? I use SanDisk Class 6 SDHC 8GB which is available from SimLim for $35.

Class 4 can handle all photo shots cos the SD card can clear the traffic. When you take video, the cache memory in the camera will clog up pretty fast. Using a Class 6 is like taking a middle ground. Fast enough for photo and somewhat slightly below average for video.

I use the same Class 6 for my HDV camcorder and it can still kick some dust.
which shop you got the class 6 sandisk?
 

wmayeo

New Member
Feb 11, 2008
1,571
0
0
Singapore
#6
Hello all,

No matter how I search, I'm still feeling uncertain of the information I've found and like to ask if anyone could point out any mistakes in my understanding of this.

Basically, SD Speed Class is the guarantee of minimum speed (i.e. Class 2 = 2MB/s).

However, Cards like Sandisk Ultra advertise 15MB/s is only a maximum read speed, and write speed still guarantees only at its class range (Class 4 in Sandisk Ultra's case).

So Speed Class is a stringent guideline on the minimum possible transfer speed, am I right?



Erm I'm using the GF-1, and reading its guidelines it says when recording HD movies, it is "recommended that you use a high-speed card of "10MB/s" and above".

If that's the case, only a class 10 card is able to record HD movies? (Like Sandisk Extreme)

I don't want to spend money unnecessarily on a high speed card... Afterall the GF1 only bursts a maximum of 3 shots/sec... nothing a Class 4 can't handle...



Thanks in advance for all your help and advice.
You're right with about the SD class. However Sandisk labeled it as Ultra (Class 4 = 15mb/s) and Extreme (Class 10 = 30mb/s).

what card are you using?

Have you tried recording video using your own SD card?

There's a Sandisk Video extreme SDHC card around, may solve your problems. But I don't see a problem doing video recording unless you're on 1080p, buffer may used up quickly on Class 4 card. :)
 

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