Hi, I am an astrophotographer and absolutely love the Sony A7s, see some of my pics here.
I am dealing with a few software programmers to obtain remote control of the camera via their software, eg. APT (Astro Photography Tools) but all are expressing frustration that they can't control the bulb mode (eg. specify a 2 minute exposure) directly from the camera. They can do this with Nikons and Canons.
Please include this feature in a future firmware upgrade?