ilariobiraghi

In this example, the quality of the Speed Booster is really degraded by the Canon 85/1.2, which isn't a very good lens.  Try putting a 55mm Zeiss Otus on a m43 Speed Booster Ultra if you want to see the state of the art in large aperture lens sharpness.

The Speedbooster combo, again, will give you more light and therefore less noise. It does, however, cost way more, have much lower image quality (until stopped down to as the same or smaller aperture than the Nocticron), and is much, much heavier. 

Another factor to consider: The Speed Booster combo will have a stop more light/less noise than the Nocticron, but because the Nocti is so much sharper wide open, you could use noise reduction in something like Neat Video and still end up with crisper results.

Thx you so much Reinaissance. Actually a good challenge could be:
mft Nocticron f/1.2 vs SpeedBoster + Canon EF 85mm f/1.2 L II.
If I'm right, in this case Canon wins in low-light. But as you said Nocticron without SpeedBoster remain sharpest. In your opinion, which between the two set handles better the noise? I mean... Canon is faster but softer with SpeedBooster (and without IS), while Nocticron darker but sharper (and IS). So if I shoot in 4K and then downscale to HD, which lens will give me less noise?
Thx a lot.

We'll have to wait until V-LOG is shipped out and tested by the various bloggers and experts. 

Wow, that's a lot of options! FS100 is a complete a solution if you can spend the money.

Low light and shallow dof means perhaps 5Dii with filter and Magic Lantern is a good choice for cheap. Then get a fast 50mm manual old prime for cheap unique look.

I don't have experience with all in this list, but the closest I've used are 5D2, 550D and FS700 (similar to FS100). GH2 costs very little and people have done a lot with it with regard to lenses, which are really important.

5Diii is probably a bit expensive for what it does.

The 5D2 and VAF is a good budget choice unless you need to shoot wider than 28mm, then your corners go soft.

The FS100 is a low light king and better value for money than the $3500 5D3. You are looking at $4000 for one used. You won't need the Shuttle unless you're doing a lot of fast camera work - action sequences and jerky handheld stuff. Internal codec is very good. D800 with the Mosaic filter will be nicer than a 5D3 image wise, but again you risk the blurry corners at wide angle.

If you can wait for the GH3 it is sounding very nice on paper. Launch is mid-September at Photokina. But on shelves? I am not sure. Could be as late as November.

GH2 for the price is unbelievably good.

But you should think as carefully about your choice of lenses for a cinematic look as about the camera. Anamorphic lenses make more of a difference. All the cameras above have strikingly different lenses available for them which give a cinematic look. Research into it. I've done a lot of lens research for the GH2 as that has been my primary camera for the last 2 years, all that is in my book. The full frame cameras and FS100 - well that depends more on your budget since the camera eats into what you could be spending on very nice lenses for the GH2.

If you have to build your lens collection from scratch go for the GH2 no question about it. The money you save, put towards good glass, makes more difference than those camera bodies towards overall cinema feel.