Originally posted by Jyrkira Have you checked the file sizes afterwards ?
Yes, if you check the "Extreme Pro" thread that I linked to earlier in this thread, I have now updated with some more shooting info.
The file sizes are remarkably consistent for a given scene and identical shooting conditions, so the comparison between firmware revisions are valid.
The K-5 with firmware 1.03 seems (by my measurements) to have an effective sustained write rate of around 17 MB/s. This is in the same ball park, but slightly slower than the 18 MB/s measured by RonHendricks (on a previous firmware).
The card I am using is the Extreme Pro, which is one of the fastest cards available for purchase today, rated at up to 45 MB/s read and write.
It seems that the K-5 write speed is limited to under 20 MB/s, regardless of how fast the card is. The K-5 does not support the new UHS104 transfer mode, which means the theoretical maximum is 25 MB/s in HS mode (50 MHz clock speed).
I was really hoping firmware 1.03 will get closer to the 25 MB/s limit, but apparently not.