Achieving a Cinematic Look
To get the cinematic look, you should go for a lens with low f-stops, usually a prime lens (one that can’t zoom in and out) or set the aperture to the lowest number of f-stops possible for that lens.
Lots of beginner videographers start with a 50mm prime lens, as it has a suitably low aperture number (f1.8) and ‘sees’ everything at a similar perspective to the human eye. Prime lenses are also good practise for camera placement, as you don’t have the option to zoom in and out.
Also try setting your DSLR to shoot at 24 frames-per-second, matching the frame rate of recording used in film cameras.
You will get the same subtle motion blur that is characteristic of film, this combined with the shallow depth of field and a little bit of colour correction in post, gives you that lush, soft film look.
Thanks to Raindance for the great tip!