I'm ready to start formal tests on a K20D, K-m and possibly a K10D with the following cards: Sandisk Extreme III 30Mb/s, Panasonic Class 6, Toshiba Class 4, etc.
I was wondering if that has been already done. I plan to create some sort of database like this:
Rob Galbraith DPI: Nikon D90
I would need to create a simple and standard procedure so that people could add their own results with their cards. It could become a sticky on the forum.
Here how I would test:
1) RAW mode (DNG to avoid compression and variance in file size). Set the camera to manual focus, manual exposure with 1/250s shutter and no more than ISO 400 or 800 (to avoid slowdowns with NR).
2) Shoot in continuous mode for 30 seconds.
3) Look how much time after 30 seconds the buffer is clearing.
4) Count the number of shots done.
5) Sum the size of the shots and divide by the number of seconds it took to clear the buffer. It would give the speed in MB/s.
Any ideas?