Julian

That's not true. A fullframe lens doesn't let more light into a micro four thirds camera either. Can't beat physics. F4 = F4, no matter what sensor size. Just the field of view changes. Also, The Master was shot on 65mm film with a Panavision 65 HR. Shooting with medium format lenses on a smaller sensor (fullframe or smaller) is not going to give the same effect. Although according to imdb they also used 35mm (Panavision Millenium XL2) with the Zeiss Jena lenses you mention.

Shot some people today! Panasonic Leica 42.5mm f/1.2 DG Noctricon OIS (handheld) Cinema 4K - 4096x2160 Cinelike D - Ungraded Aperture: f/1.6 (Vari ND filter used) Shutter: 1/50 ISO: 200 White Balance: Daylight

Did you read all of it? The following is from the supposably leaked press release:

It's not all about the sensor. I would like to see the perfect hybrid camera for photography / video. I like fullframe for photo's, I don't mind (and like in some ways) M43 for video. A 0,5x Speed Booster with fast AF and electronic functionality would be awesome. So you could have all the benefits of fullframe and m43 in one camera. It would also give you superfast lenses so you don't have to worry much about iso performance or shallow dof. The GH4 is pretty much the perfect camera for me right now. Love the form factor. If I could add features: A bigger flip screen, without compromising size Tiltable EVF, like the GX7 / Samsung NX30 4K 4:2:2 10-bit internal recording or with a small attachment, like a normal size battery grip, that doesn't cost $2K. Compressed raw! Like RED. Custom video aspect ratio's and anamorphic desqueeze for the screen/evf Better quality 1080p slomo @ 120 fps, 720p @ 240 fps Last but not least: 2x or 1.5x Anamorphic adapter like the SLR Magic (single focus, same price range), with character like a Kowa or Iscorama.

Rolling shutter test. I would never shoot something like this (I'd do it with a wide angle) but the RS doesn't look bad at all to me.

Looks great. Would love to see more. I still have to make a video with my DSO 2x f/4 oval combined with the Kowa B&H 2x in ML raw 4:3... 4x anamorphic bokeh! ;)

The battery is excellent by the way. Shot 179 4K clips today (10-20 seconds) between 11:30 - 15:00, camera was on pretty much all of the time. Still 2/3 full.

More slow motion:

Can't help you without a proper name or a picture. This says as much as '35mm digital camera'...

I've been playing with the GH4 for a while now. I'll share my video's here. Shot a lot more material, still have to edit/upload it. Will do so in the following days. Go over to Vimeo/YouTube for all the details in the lenses/profiles/settings used. You can download 4K files or high bitrate on Vimeo. Cinema 4K mode - sunset and lowlight. The 14mm makes razorsharp 4K images. Also used a cheap 200mm f/3.5 Vivitar lens. Hard to get the focus exactly right and maybe not really suitable for 4K. For the video on Vimeo I used pretty high iso values. Shots with the birds are 3200 for example. 96 fps slomo test: with shallow dof shots it is pretty sharp. I have some slomo sufing shots as well, the resolution looks less good with very detailed scenes. Short test shot at ISO6400 in C4K. Anamorphic test with Minolta MD 28mm f/2.8 and Petit Cinevision 1.5x

You can get MD adapters for like $15 shipping included from China/Hong Kong. MD lenses are cheap too, that 28mm 3.5 you have will probably sell for like 5 or 10 dollars... Can't decide for you if it's worth it. They are cheap, probably too soft for 4K wide open. But then again, it costs next to nothing.

No mirror = EVF and short flange back so you can adapt pretty much every lens that exists. Both nice for video.

Here a short clip at ISO 6400. Non anamorphic. You can download the 4K file on Vimeo.

I love it! Great shots and very good edit too. Did you stabilize some shots in post?

I changed the iso a few times. Maybe the first shots without the flashlight where 6400. Most shots are at 4000, a few maybe a bit less. Sucks that this information isn't stored in the file...

Panasonic Benelux told me beginning of May it's selling here.

It definitely looks expensive. Saw some pictures from NAB, it's huge.

Are you calling my cat fat!? :p I absolutely love the GH4. I bought a 5D Mark II a while a go to shoot ML raw but actually I never use it because the workflow is just too much trouble for me. The GH4 is small, it has pretty much everything you need. Great EVF, great flip screen. Focus peaking, zebras, good customizable profiles, electronic level. I love the 96 fps slomo. The quality isn't as good as normal 1080p but it is a lot of fun to use. Also it has a perfect built in time lapse mode, and electronic shutter so it won't wear out the camera. The 4K 100mbps files are very easy to work with. In Premiere CC I don't notice any difference with 1080p, only exporting takes longer (like 25 minutes for this video). I'm using a 3 year old pc: Intel i5 2400, 16GB, GTX660, SSD for software, files are on a normal hdd. Haven't tried grading in resolve yet, will do soon. I edited on a 5760 x 2160 timeline but Premiere doesn't let me export that size (max 4096), so I exported to 3840x1440 because I think that will scale the best on 1080p screens. You can download the 4K file from vimeo. For me it's a perfect camera. I'm just a hobby shooter, I can just grab it and go... No need for rigs or whatever extras. Can adapt pretty much every lens to it. Just have to grab a speed booster of some sort. Only wish I have left is stabilisation. There aren't many native m43 lenses with OIS, except for the zooms and they are either cheap with small aperture or pretty expensive (12-35mm 2.8). I'd love some cheap-ish primes with OIS. This anamorphic lens is tiny btw.

Recently I got a cat, so now I can make proper test videos :P Panasonic GH4 firmware 1.0 Lens: Minolta MD 28mm f/2.8 + >Petit Cinevision 1.5x anamorphot 4K @ 24 fps (3840x2160) Cinelike V profile, ungraded All shots at f/2.8, 1/50. ISO around 4000. Soundtrack: "Menehune Dance" by James Pants (jamespants.com)

In 4k mode the GH4 doesn't use the whole sensor. It's a 4096 pixel crop of the sensor that is 4608 pixels wide.

Awesome. I was thinking about that and it makes sense of course, since they did the same for BlackMagic. Hope they'll manage to make it with active Canon EF mount..

I'd love to see some shots (wide open) with the Iscorama on the Bolex!

Let us know the outcome!

I don't think the production cost of a camera (or whatever device) is very relevant for the retraul price. Sony can (and will) price it whatever they want and whatever they think is 'best'. Maybe they haven't even determined the price yet... just feeling how the market reacts to it.. price it accordingly.