Optimizing the Sony A7s camera for best performance means working with an external battery because the stock internal batteries suck. Getting the best means adding a 4K HDMI recorder like the Atomos Shogun, because it can't record it's highest quality internally.
Sony A7s Camera
Atomos Shogun 4K
To run a camera system with these add-ons, you'll need a cage system for mounting these accessories. While there are many options for putting a kit together, in this video we'll be taking a look at the Varavon Sony A7s Armor II Cage, Varavon T-Power A7s Battery Kit, and Varavon Armor Shogun Cage.
The Sony A7s Armor II Cage features a Top Handle, Audio and HDMI Locks, Leather Hand Strap, cold shoe mount, (3) 15mm Rod Clamps, (1) 15mm Carbon Rod, and several threaded mounting points. For more information on this kit, visit the product page (here).
The Varavon Armor for Atomos Shogun features a one piece cage design, HDMI locks, XLR audio shock protection, threaded mounts, rubber dampers, and optional battery or solid state drive brackets. For information about the Varavon Armor cage for Atomos Shogun visit the product page (here).
The Varavon A7s external Battery Kit comes with a High Capacity Cell, A7s Battery Coupler, 2.1-5.5 Cable, and Charging Adapter. This battery hit will allow the Sony A7s to run more than 4 times longer than standard sony batteries. For more info visit the product page (here).