CF cards

funflyer

New member
Messages
5
Reaction score
0
Location
US
Does anybody know of a way to test the ACTUAL speed and capacity of a CF card besides filling it up on the camera and then timing the download time ? Thanks. Rad
 
There ARE variables, if you take an image of something that is one solid color, it will have a smaller files size than one with two colors/4 coulours/etc.
--
.. even when shooting RAW, which surprised me a bit.

Peter
 
Hi,

Also keep in mind with High Speed CF (&SD) cards if you are going to benchmark them that you may be limitied by your interface i.e Card Reader. Also if you are using a simple copy to hard drive to measure performance that may be the bottle neck as well.

If your card reader is USB 2.0 it has a theroretical max transfer of 60MB/s but about 40MB/s is about the most you'll ever see. It will be less if it's a cheap reader that uses an inferior controller.

Also if you are copying to a laptop for example that only has a 5400RPM Hard Drive expect to see about 30MB/s max

Proper Benchmarking programs will copy Data to RAM so hard drive speed doesn't play a part but your card reader may still be an issue.
Just a couple of things to keep in mind when testing cards...

Regards,
 
Canon uses lossless compression in CR2's. I don't know what algorithm they use, but CR2 is closely related to TIF which can be compressed.
There ARE variables, if you take an image of something that is one solid color, it will have a smaller files size than one with two colors/4 coulours/etc.
--
.. even when shooting RAW, which surprised me a bit.

Peter
 

Keyboard shortcuts

Back
Top