Hi,
The RAW files from my A650IS using CHDK were 15,270 KB and a sample RAW file from a G9 was 14,216 KB (not using CHDK, native RAW). From the various postings on this forum and my search of the internet, my understanding is that the bit depth of each channel of the RAW file for the A650IS is 10 bits while the G9 RAW file bit depth for each channel is 12 bits.
1. Why are the A650IS RAW files larger than the G9 RAW files if the files contain less bit depth and do not have the EXIF information?
2. I thought that both cameras use the same sensor. If this is so, why would the two cameras generate different RAW bit depth files if the RAW files are just unprocessed data from the sensor?
3. What is the size of the G9 RAW files generated using CHDK?
4. Are the G9 RAW files generated using CHDK the same as the native G9 RAW files (other than the missing EXIF data)?
5. Can Adobe Photoshop provide the bit depth per channel information (from a CHDK RAW file converted to DNG) and if not, what software (preferably free) can provide that information?
