I use mamiya software for normal daily use, but for high iso photos (200-400) I have found camera Raw to be faaar better in getting detail without noise; if the photo is processed with Noise Ninja afterwards, the results are one step ahead from Mamiya Soft or Silkypix. I haven´t been able to make bridge work with mef files but I think it's a problem of mine installing camera raw 3.3 and 3.4. BTW, I had the idea to convert .mef files to DNG, becasue I though it was a "universal" format and that I could try to process them with any other raw converters; what was my surprise when I discovered that DNG are also camera specific, and that, as an example, I can open DNG from a Canon on RawShooter but not from the mamiya. Then what's the point in converting files to DNG???. I think I will stick with Mamiya Software and ACR. One question, Is there any Mamiya user who knows how to change metadata in mef files? Is it possible?.