Looking into the future, i am thinking that in my list of things i want, would be something to use Photo Lenses for Video to get that DOF etc that you can only get with them

So the question is, what works out best in terms of the video it produces, and the price

Some sort of DOF Converter for the Video camera, or a DSLR that does HD Video ?

And with the DOF Converters, is there ones that would fit a bigger diameter like the Sony FX1 , because the ones i have seen seem to be for smaller sizes in and around the 30 - 40mm filter size

Anyone got / had anything like this that they could recomend ?