Anyone has determined the maximum achievable DR using RAW files with Lightroom ?!
Thierry, the dynamic range depends on what you deem as acceptable noise. If you put up with higher noise, the DR is larger. This depends on your personal preference, which in turn surely depends on the setting as well: you accept less noise in a landscape image shot in bright sunlight @ ISO 80 or in a portrait than in a night concert with very low light, shot @ ISO 800.
Look at for example the images on this site
. Select such from the JPEGs, which are available in raw as well, like the #31 in JPEG, the cook sitting outside (this is an ISO 800 shot).
Looking at the respective raw file reveals, that his left hand middle finger is close to the sixth stop, his forehead is @ 5.5, his nose is @ 6. (It is interesting, that the blue channel is the lowest, i.e. most noisy. Other, comparable images reveal, that the blue filter of the G10 is much stronger than in the Canon DSLRs.)