One of the biggest complaint on Sony A7 (A7s/A7rII,etc) camera bodies is placement of the Video Start/Stop Button. Even though on the new Sony A7RII (and Sony A7sII) the Video Button can be reprogrammed, it's still in a very inconvenient place. Especially if you're working with a gimbal stabilizer, or shoulder rig. To solve this problem, you can add one of these Remotes. Here's a short video about the Fotga Remote for Sony Cameras (found here).
This Fotga Remote will not only make your life a lot easier, but make you more efficient. Being able to Start and Stop video means that each video clip will have a perfect beginning and end, so you don't have to trim out those unwanted sections in post. It means keeping your hands on your shoulder rig or on your Gimbal Stabilizer so you don't get off balance. You can also mount the remote to the handle of your Video Tripod!
There is both a 1/4-20 thread in the remote as well as an area for elastic strap, giving you endless mounting options.
It plugs directly into your Sony's multi-port (usb), so no worries about IR or line of sight issues. If you're using a Shogun recorder with your Sony camera, you can even configure your camera to auto trigger recording on the Atomos Shogun. One more thing I failed to mention in the video, there's also an ON/BUTTON Slider on the side of the remote. It works perfectly with my Sony A7RII and kicks the camera on/off instantly with no lag! Perfect addition for conserving battery power and keeping the camera from overheating without taking your hands off a gimbal or shoulder rig.
The Fotga remote is half the price of the OEM Sony version (seen here), but works just as well and build quality is excellent - a must have for any Sony A7 shooter.