Sony's helping you out to take shake-free tripod exposures with a new camera app. The Touchless Shutter app works with Sony cameras with built-in or optional electronic viewfinders (full list of compatible cameras here). What it does is you just have to  wave your hand over the EVF and it'll trigger the shutter. For the A7S and A7II, you can even control bulb shooting. Just wave once to open the shutter and wave again to close. 

Source: Gizmodo