Actually I have the Sony a7s. Yes it is sharp. You can create that film look in post. And control how soft you want it. This makes it a better option in low light situations.
Guys.. make sure you delete the fail MOV files before you re-render. The mov.sfl file that is still on your drive needs to be deleted. I have found that mov.sfl needs to be removed, in order it to render another clean mov clip.
Very simple you can create a mask or use the Soft Contrast FX in Vegas. It’s already have all the masks features build inside, with color change and blur background with film look.