Head to Head: Panasonic GH4 vs. Sony a7S

Shop at B&H:
http://bit.ly/SonyA7s4K
http://bit.ly/PanasonicGH44KCamera
If you're thinking about buying a DSLR with 4K capabilities then the Panasonic GH4 and Sony a7S are two to consider. Mia McCormick compares the two to help you choose the best camera for your needs.