Question about memory?

[kylesfreelance]

I cant figure out what memory has the 10 on it for sd and sd hc. I heard its photography important not sure I read it somewere on here.

 

[usayit]

You mean class 10?

It simply means the SD card is capable of at LEAST 10 MB/sec for read write.

Many cards are several times that speed now.... whether or not it is important to your camera is up to your camera's ability to perform read and writes to that card.

 

[480sparky43 42]

Click here.

 

[TCampbell]

The symbol means the card has passed a benchmark test signifying a minimum performance with regard to how fast the card can transfer data. The C with the 10 inside signifies that it passed a particular test showing that it can transfer data for both reading AND writing at a minimum of 10 megabytes per second SUSTAINED speed (not just a momentary burst.)

It's less important for still photography but more important for video where the camera is going to capture frames and start throwing data at the card. If the card can't keep up with the rate that the camera is recording video then you're going to have problems. With still photos the camera has an internal memory buffer ... it really saves the image to internal memory and then feeds it to the card at whatever speed the card can handle. If the card is slow then you may take a handful of frames and find that you have to pause a few moments before you can continue shooting.

Sparky provided the link to the website explaining the various tests and the symbol used to designate that a card is compatible with a standard and has passed the test.

 

[SCraig]

The symbol means the card has passed a benchmark test signifying a minimum performance with regard to how fast the card can transfer data. The C with the 10 inside signifies that it passed a particular test showing that it can transfer data for both reading AND writing at a minimum of 10 megabytes per second SUSTAINED speed (not just a momentary burst.)

It's less important for still photography but more important for video where the camera is going to capture frames and start throwing data at the card. If the card can't keep up with the rate that the camera is recording video then you're going to have problems. With still photos the camera has an internal memory buffer ... it really saves the image to internal memory and then feeds it to the card at whatever speed the card can handle. If the card is slow then you may take a handful of frames and find that you have to pause a few moments before you can continue shooting.

Sparky provided the link to the website explaining the various tests and the symbol used to designate that a card is compatible with a standard and has passed the test.

Actually I think it means that SAMPLES of the card have passed the specified tests. I could be wrong but I doubt that the manufacturers benchmark each and every card off the assembly line to insure that they meet specs.

Some manufacturers and resellers do take their specifications and warranty very seriously however there are others who are more concerned with sales than quality. I don't know exactly where that line is drawn which is why I tend to stick with a couple of manufacturers that I've used for a very long time with no problems.

 

[runnah]

99% of the time the two numbers on the front of the card are the capacity and write speed.

The write speed only comes into effect if you are using your DSLR to shoot video or if you plan on taking rapid fire raw images. If you have bought the card in the last 3-4 years you should be fine for both cases.