
Originally Posted by
DanK
I think there is a third reason to do my own processing rather than relying on the camera, and that is simply that the engineer designing a picture style can't possibly know what conditions you will face when you take a picture. You may encounter conditions that exceed what the camera can handle, as Manfred wrote. But you may run into things that are well within the camera's capability but that make for an unsatisfying image. A good example, I think, is the limited dynamic range one encounters on cloudy days. You might want to preserve that, in which case a jpeg is fine. You may not want to preserve that, in which case you need to stretch the range and boost contrast. The engineer(s) can't possibly anticipate that. The result is that your processing may look dramatically different from the in-camera jpeg, even if you have exposed perfectly.
JPEGs make sense to me in situations where one needs to shoot a lot and conditions are such that the pre-set processing algorithms are likely to be close enough. I don't typically encounter this in my own photography, but others do. For example, I would wager that the photographers who took my kids' wedding photos shot jpeg.