card speeds

londonbackpackr

londonbackpackr

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I'm currently using a Kingston 16 gb class 10 100x SD card, which I believe R/W at 10 MB/s.

I usually just shoot in JPEG but have tried RAW a few times but find the writing to the card very slow, if I bought a card that R/W at 45MB/s would this give me write times 4x faster or is it down to the software in the camera.

LB
 
Card speeds are only relevant when you want to take a lot of shots in succession, either individually or machine gunning at whatever fps your camera can do. The speed at which the camera can clear the buffer to the card may hold you up. It depends on you style of shooting as to whether this is an issue. The other time is when downloading to the PC and how impatient you are. Most of the cards I use on my 7D are only 133X and I don't find it a limiting factor to be honest.
 
I use a 133x in my 5D3 and 1DX and don't have any problems. Mind you they are CF cards so I don't know if that makes any difference.
 
Certainly wouldn't be 4 times faster but maybe a little. Probably the limits of the camera.
 
londonbackpackr said:
I'm currently using a Kingston 16 gb class 10 100x SD card, which I believe R/W at 10 MB/s.

I usually just shoot in JPEG but have tried RAW a few times but find the writing to the card very slow, if I bought a card that R/W at 45MB/s would this give me write times 4x faster or is it down to the software in the camera.

LB
Click to expand...

Your camera manual will tell you the read/write speed for the camera (at least Nikon ones do). Using a card that is faster than that certainly doesn't benefit you. Your camera isn't showing so I can't be more specific for you, sorry.

As you're shooting in JPG there may be some additional delay due to processing the various camera setting before writing to the card, e.g. if you have noise reduction set it can delay the writing to the card. RAW files take longer simply because they're bigger.

Quick edit: Your statement about Class 10 and 100x don't actually tally. Class 10 is actually 66x; 100x is Class 15 (120Mb/s = 15MB/s)

Hope that helps :)
 
Last edited:
Bristolian said:
Quick edit: Your statement about Class 10 and 100x don't actually tally. Class 10 is actually 66x; 100x is Class 15
Click to expand...

Except that there's no such thing as Class 15. A Class 10 designation means that the card will read/write speed will be at least 10 MB/s.
 
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