Is the A7s 1080p really sharp? I'm watching a lot of videos but I always have the feeling they tend to be soft. Maybe it's just that people tend to use wider aperture on full frame. Note: I'm not trolling this thread, I'm just considering very seriously buying an A7s, and that would be quite an investment, plus I would have to sell some of my best m43 lenses ... so not easy decision :)

@flablo, I'm finding that usually my cheap plastic Sony 28-70 kit lens seems to be almost as sharp as my voigtlander 25 mm on my Gh2 with 2.8 aperture. I have sharpness dialed down to minimum in both cams. I have a feeling that the sharp look you are after can be achieved with a sharpening plugin.

+1 on the kit lens. It's quite excellent.

I'm interested in getting the A7s but i'm not sure what lens to get with it. I wanted to get the 24-70 for starters, but if you guys saying the 28-70 is actually really good then i might aswell get that one as it's much cheaper. Thoughts?

For handheld video shooting, I strongly recommend getting one of the Sony zooms. Even the cheapest option, the 28-70, has very good stabilization. You can, for example, pan it or move up and down without issues. I can shoot without my shoulder rig and get very stable videos that require no post processing. I don't even think about taking a rig with me anymore.

A few more A7S vids...

http://www.learningdslrvideo.com/what-i-learned-a7s/

@flablo

As to the weird tones; this camera needs 10 bit. S-log simply needs it.

Sony omitted this from hdmi out (unfortunate...) To avoid strange green skin tones and banding, avoid s-log on a7s. This camera brings the dr stops, but not a professional solution.

It is a much better camera than the GH2 (amazing hack aside). It falls short of ideal though; there is a dynamic quality missing when s-log is graded back to full contrast. While there is no green gain push of the GH2, the red saturation in skin takes a hit from the color crunching. The common s-log2 has been a problematic path. These are initial impressions; that said, I am sure with more work the camera can give great results. What are your settings/workflow?