BMPCC 4K SENSOR/AAF

Hi,

1. What type of sensor is installed in the new BMPCC4K: the old bmcc or the new um 4.6k one? Or?
2. Is there an AAF installed?

Non of the previous sensors.. I read somewhere it has a Sony sensor inside that is also used on the GH5. But i can't confirm that. Nor can i find the source at this moment.. Seen so much websites since the announcement yesterday..

Yes, several,sources, inc,using RedShark, mentioned it looks like the same sensor used in the GH5S (not the GH5), made by Sony. This looks like a very nice sensor, lots of features with the dual Gain circuits working in serial to push the useable ISO up.

I was looking at the GH5S, which has a larger sensor (18.96x10mm) than the other GH4/5 cameras that have the traditional sized 4:3 sensor (17x13mm). For reference, the AF100 also had a 16:9 custom MFT sensor which was 17.8x10mm. Given the wider sensor size, the 4KDCI mode will be closer to 17:9 aspect ratio, as it is in the GH5S.

The wider MFT sensors give slightly better AOV at a given focal length, and have a 135mm FF difference closer to 1.8 vs 2.0 with the smaller MFT sensors. So combined with a X0.71 Speed Booster, you end up getting S35 AOV when using the larger 135 camers lenses with the SB on the new camera.
Cheers

Yes, I’m sure it’s the same sensor as the GH5S. Both are 18.96x10mm with the same features. Probably good that it’s a Sony sensor in terms of reliability and performance.

The horizontal crop compared to 135 film will be very close to 1.9x versus the 2.08x crop of a typical MFT sensor 17.3mm wide.

same sensor is also found in the kinefinity Terra which is maybe a better guide as to what its likely to perform like in the new pocket 4k

Philip Bloom's site has a good review of the Terra with lots of very nice looking footage

From this site: (Can't POST URL)
panasonic(dot)com uk consumer cameras-camcorders lumix-g-compact-system-cameras
dc-gh5s(dot)specs(dot)html

The DC-GH5s sensor is detailed as:
Image sensor size: 17.3 x 13.0 mm (in 4:3 aspect ratio)
Type: Live MOS Sensor
Total pixels 11.93 Megapixels
Camera effective pixels 10.28 Megapixels

With a Still image aspect ratio of: 4:3, 3:2, 16:9 and 1:1
at 1:1 2752x2752(L) / 1936x1936(M) / 1360x1360(S) / 2880x2880(4K PHOTO)

Note the hight of 2880.

I think the Black Magic Pocket 4K is more inline with the Fairchilds Imaging MST4323A sensor
A sCMOS2.0 4096x2160 4/3" at 4.6x4.6 mircons 120 fps rolling.

Check out this youtube vid at 2:16 and 5:55 for AAF (4K DCI down sample to HD). Grant gives the insight into the working of BMPCC4K.
youtube(dot)com watch?v=UDAdeYLHjSs

Have a great day.

if you look at BMD's product page for the new BMPCC 4k and look at the images there showing the actual sensor it's clearly the sony sensor (ie it matches precisely the distinctive look of the sensor in the GH5s for example)

also in evidence is the sudden jump in ISO performance over the previous fairchild implementations in the other BM cameras, that again very closely aligns with the GH5S and kinefinity terra

The Panasonic site is not giving the actual GH5S sensor size, but rather the standard MFT sensor size used in the GH4/5, which is Not the sensor in the GH5S.
Cheers

Thanks to everyone for your detailed replies and links! Looking forward to get some footage soon.
It is interesting in respect of BM color science touch, aliasing and rolling shutter compared to the previous 4.6k sensor.

So i called this as soon as I knew they were going for MFT..

They are using the Sony Starvis IMX294CJK sensor designed by Mr. Isoo , Mr. Takamoto @ Sony. The same that is found in the GH5S, Terra 4K and Z Cam E2. This is a fantastic sensor much more modern than the older Fairchild stuff they have been using.

A sensor Sony had marketed towards "Security Camera and Industrial Applications".. I bet they did not see the huge cinema adortion for it.

The biggest "problem" for this sensor is that it "only" has 13 stops of DR. It cannot compare to "real" cinema sensors going for 15+ stops. For most, it won't be a problem though.

The sensor can actually do 120fps in 4K and

I think it funny to look at the markedet and observere how Panasonic, Kinefinity and Blackmagic all have gone for sperate things. Gh5S pushing for compactness and therefore only delivering 10bit 400mbps. And in a marketing perspective it suits the Panny lineup perfect with the dual native ISO also found in the Varicam and EVA-1.
Kinefintity going for much more with almost maxing out the sensor specs. 4K 100fps internal raw 12bit and opto 240fps in 1920x800 2K wide. And still in a compact setup. But for 4-6 times the cost of the BMPCC4K.
And then BMD going for a more conservative spec but still huuuuge specs compared to GH5S but at a price no-body would imagine.. I think they could sell just as many BMPCC4K at a price of 2.000$.

So I read the IMX29CJK PDF, its a 4.63 micron cell size & supports:

All-pixel scan (aspect ratio 17:9), 4096 (H) × 2160 (V) 60 fps (SLVS-EC) ADC 12 bit
All-pixel scan (aspect ratio 17:9), 2048 (H) × 1080 (V) 120 fps (SLVS-EC) ADC 12 bit

Where SLVS-EC is Scalable Low Voltage Signaling Embedded Clock, high speed serial interface.

Looks like a good fit.

There is something to be said though for a sensor that shines in low light where the reduced dynamic range may not be a critical factor as most low light situations are going to have less dynamic range in the scene. 11 stops is fine if your light levels are less than 11 stops.

Back on the daylight portion of the sensor with 13 stops, there certainly will be times when you might want to switch to the camera with 15 stops. If the images end up being relatively easy to match in terms of colour, it may make sense to have those two cameras and go back and forth using their strengths.


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