Hi All,
Thanks for your reply.
Let me give a little more detials and update.
I'm using EOS 5D. I took some photo using the Sigma 12-24 in RAW format.
I used the DPP 2.2 to convert the RAW photo to JPEG photo. The photo quality is excellent, I can't tell the different between the RAW and JPEG photos. However I discovered that only the very basic EXIF data is retained in the converted JPEG files. Many other important data like "Lens", "Owner's name", "Camera body no.", . . . . .etc are missing.
I have down loaded and tried the "Breeze Browser Pro" trial copy, it retained all EXIF data from the RAW files to JPEG file but unfortunately the JPEG photo quality is very soft and not acceptable for me.
I have down loaded and tried the PSCS2. Just like DPP2.2, PSCS2 also omitted those EXIF data and the converted JPEG photo quality is as soft as "Breeze Browser Pro" .
It seems that only DPP know how to convert Canon's own RAW format into JPEG format without losing the sharpness and clarity.
I'm finding the way to report this problem to DPP. I do hope that the EXIF problem will be fixed by the future release of DPP.