If you didn't purchase yet, did you consider the a9 mentioned a few times in this blog? You might not need the extra MP of the a7s II.

Comparison for video:

https://www.dpreview.com/articles/2661726126/alpha-better-so...

Field notes:

Used one on a trip in Europe. The light gathering is astonishing, both photos and video. Street shooting at night in dimly lit rural towns, almost every shot looks better than it did to naked eye.

Only took two very small lenses, FE 2/28 and FE 1.8/50, both gave results that belie their size and cost. It autofocused down to light levels that would need a 15 second exposure at f2 (candlelight is EV 4, autofocuses down to EV -3). It autofocused on stars.

The main thing I can't get over is its uncanny ability to nail tack sharp focus on the iris of either the main face in my image or the preferred registered face among many faces, at arbitrary distances from face larger than frame to far enough away focus doesn't matter.

Yep, and the A9 is, with ~3k4€ just for the body, outside of my price range unfortunately :(

The A7s2 costs ~2k€, I'll have to spend at least a grand on lenses and another grand for the XLR/mike head and the external battery pack... thanks for the heads-up on the performance though, hope the A7S will live up to expectations ;)

I think that a more-realistic competitor of the A7SII is the Fuji X-T2. The Fuji has a wonderful feel, the UX is really impressively simple and just 'feels right'.

Had I not already invested in another system, I'd probably have gone Fuji.

Ignore the other poster who recommended buying an a9. If all you want to do is video (and you want a sony) then the a7s2 is the best machine for the job, a9 is more trying to be a fast sports shooter. I have the A7R2 and even its video is pretty darn good, no S-Log3 and not the same amazing (it really is this good) low light performance as the A7S2 though.

The only gripes which I have with the Sony systems are the unintuitive menu systems and unergonomic body styles, compared to Canon DSLR's though of 5D / 1D ilk (and most recently, the Leica SL which is just a dream to handle).

Other than that, technically, on paper, they are amazing cameras.

p.s: IBIS is amazing, you can take pretty much any old lens and all of a sudden it's stabilised.

Sensor- and lens-based stabilization takes care of the problem, as long as you don't kick your tripod. The problem isn't camera specific, and the long tele lens problem is more serious (although also pretty much fixed entirely by stabilization—some in-lens stabilization is hardcore enough that you can violently shake the setup with a tele mounted, and the image feed will still be perfectly stable).