From: About DSLR (Youtube).
For my type of videography, the benefits of having not only 4K, but a wider range of options for recording will allow me to crop and downscale any 4K acquisition to HD and hold incredible picture detail, dynamic range and depth of field.
The recording bit rates are higher, meaning more data is stored for post production editing, compositing or grading.
Lastly, it should increase the production value of what I produce. Now, I am not stating that better equipment makes better videos. It does give you the opportunity to step up with what you can do in your work, and especially as it keeps you up to date in a world of ever changing and improving technology.
So, what is my investment cost?
This is dependent on your current shooting kit, and whether you can merge your current system with a new one. Perhaps you already shoot Sony or Panny, so you're in luck.
For me, all my lenses are Canon EF mount, some are electronic, others are manual, so an adapter would be needed in my case. The price of this is dependent on the glass you use, or are going to use.
Let's look at the Panasonic GH4 to start with.
Panasonic GH4 (body only) - £1296.00
Metabones Speedbooster EF to MFT (smart with electronics) - £468.00
GH4 batteries x 2 -£130
Transcend 600x ultimate SD card x 2 (Amazon price) - £36
Now, as the GH4 is MFT, I might purchase a wide angle lens because my current ultra wide angle 14mm T/3.1 would be almost 28mm T/6 due to the sensor equivalence. So, my options would be either:
Panasonic 12 - 35mm F/2.8 - £829.00
I did have the Samyang 12mm T/2, realizing it does not come in MFT mount.. So the above would be my option. I have used it before, it has great OIS and has a decent depth of field for an F/5.6 equivalent lens.
Total GH4 investment inc extra lens - £2759.00 (excluding extra lens - £1930.00)
That £1930 was pretty much the same price I paid for the 5D mkIII body only.