>>I recently read that 30P and -3db gave the most film like quality.
I’m not sure what either one of those has with “film like quality”.
FIlm can be shot at 30, but most are used to the 24fps look, so If that
is what you are going for then HQ 24p is what you want to shoot with.
-3db is just how much video noise you see. Increasing the sensitivity brightens
the picture but ads more noise. This can actually be a little reminiscent of 16mm film,
but not sure what you are getting at here. -3db is good to use no matter what you are
shooting and will provide a cleaner picture.
The adapters are a whole other discussion which you can find about 50 million sites and
message boards on to research.
Make sure and experiment with the many Picture Profiles floating around the internet.
There are some with some film-like gamma settings which have a nice look to them.