I am taking 5 bracketed pictures in RAW on the GF-5 using the high speed function...it thus takes 5 pictures in quick succession , but sometimes after 2 or 3 shots it stops to write to the card. It then only resumes after 10 seconds or so to take the remaining bracketed pics of the sequence. It only does this some of the time...usually it manages all 5 bracketed pics in quick succession. The SD card I am using is a SanDisk Ultra 8GB class 4 SDHC 15MB/s Is the card too slow for the RAW bracketed sequence or is it a GF-5 buffer limitation? Thanks!