Originally posted by axelm7 I don't really use the camera and lens profiles at all. I've never had to use them, as I adjust everything myself. They're not necessary if you know how to handle the software, so in that sense what I said still stands true. No need to upgrade in 3-5 years.
This is not always possible, sadly.
Think about the distortion correction, for instance: were it a perfect barrel or a perfect pincushion distortion you'd just have to drag a slider and you'd be done...
Actually, from what I've seen, it's mostly non-linear, so you can't do it by hand.
You could create a lens profile for your lens-camera combination, but with multiple lenses, zooms, etc. it quickly becomes a nightmare...
Then again, it depends on the lenses... older SMC-M primes have so little distortion I never correct them at all...