Blackmagic Forum

Hello!

Maybe a stupid question, but I think it's valid when I saw the frame-rates Pyxis 12k can do.

Is there any possibilities for the Cine 12k LF to do more than 60fps on a 14.8v V-mount battery in the future?
At least something similar to the Pyxis 12k.
I mean, I don't need 224fps, but 100fps at 4k would be really nice

(yes I know I can change to B-mount, but I have a lot of V-mount batteries and I dont use high-speed that often)

I suspect there’s more power draw from the camera with the extra monitor and all that may mean 14V batteries provide a little less to the processor for handling higher frame rates in the realm of the PYXIS 12K. But that’s only my guess. No technical information to support that claim.

Maybe someone from Blackmagic can actually give a technical answer.


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Upgrade to B-mount and use your v-mounts for lights.

Buy another camera…

I know that may sound harsh as a statement, however, it is the only concrete one. If a camera especially like this one that has a very large sensor, so it has a number of elements that handle that mass of data that is captured per second, it is highly unlikely that it will change as a capture characteristic in the future, unless you are talking about a capture with a sensor crop that allows A reduction in the data stream

Increasing the capture speed of a sensor is not only a physical matter, so power supply and data transfer, we also have to add a processing part, control to avoid image distortion, and many other factors. If in analog it is enough to increase the film speed and Only worry about the accuracy of the dragging motion, in the digital world there are so many changes that take place when changing a data stream, that is why even though many machines have the ability to work at very high shutter speed, they are not able to make video with as many frames per second, I am speaking for both photography and video.


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There's a huge amount going on inside the UC 12K, computationally speaking. There's the image processing to begin with, then the five separate individually configurable monitors (two that are built in), WiFi, streaming hardware, recording hardware, etc... and at the data rates that this camera can handle, that takes a lot of computing power.

Add to that the fact that there is a controller chip stacked onto the back of the sensor, and to enable such huge resolution while still maintaining a clean enough image to provide such a huge dynamic range, the sensor has to stay cool even while working hard AND having a chip stuck on its back that is ALSO working very hard, because that's where the subsampling for lower resolution settings happens.

To keep that cool BMD is using a Peltier cooler, which also requires power, and has infrastructure to power some additional devices like a focus motor and wireless video, hardware streaming encoder, etc.

That takes power.

Maybe dumb question, but does running in 14v mode affect readout speed on the Cine or just recordable framerate? Curious about the interplay with everything.

Probably both, because I'm guessing that the system clock speeds are lower with a smaller power supply.

But only BMD has the knowledge for a definitive answer.

No the readout speed doesn't change... just the maximum frame rate and the additional power outputs.

And there's the answer

Thanks, Tim!

Thank you Tim! Glad to hear the sensor readout speed stays the same. This is good if I want to cut weight for a Steadicam and can only provide 14.8V via the D-Tap to Power Adapter.

That's what the Pyxis 12K is for

Rakesh Malik wrote:That's what the Pyxis 12K is for

Yeah, I know. I'm still trying to sell my Steadicam anyways since I haven't really been asked to use it by any paying clients in near 2-years now. So it sits on the shelf most of the time. However, the PYXIS 12K would be perfectly adequate for using on the Steadicam.

larshaugehoel wrote:Hello!

Maybe a stupid question, but I think it's valid when I saw the frame-rates Pyxis 12k can do.

Is there any possibilities for the Cine 12k LF to do more than 60fps on a 14.8v V-mount battery in the future?
At least something similar to the Pyxis 12k.
I mean, I don't need 224fps, but 100fps at 4k would be really nice

(yes I know I can change to B-mount, but I have a lot of V-mount batteries and I dont use high-speed that often)

Since you have a lot of V-Mount batteries, you could get the ursa cine v-mount plate and a few Core SWX V-Mount Helix Max dual voltage batteries for when you need higher frame rates/power out of the ports on the front. Then all your other v-mounts should work just fine for project base frame rates.

I have been doing exactly that this week, and it has worked perfectly. I haven't needed the additional power outputs, but I have like 8 other 14.8v core micro v-mounts that kept me running the whole day. Running the shark fin and hot swap all day

Thanks Tyler!

Exactly the answer I was looking for

Just to be sure, is this the type that will work in the high-voltage mode?

https://www.bhphotovideo.com/c/product/ ... m_ion.html

larshaugehoel wrote:Thanks Tyler!

Exactly the answer I was looking for

Just to be sure, is this the type that will work in the high-voltage mode?

https://www.bhphotovideo.com/c/product/ ... m_ion.html

Yes. I have that 275Wh CoreSWX Helix Max in B-Mount and works great with the URSA Cine. I’m getting 3hr 45min per battery easily when only powering camera and EVF. Powering additional accessories like wireless lens motors and a wireless transmitter doesn’t seem to negatively affect battery life too much as I’ll then still get 3hr 30min per battery.


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larshaugehoel wrote:Thanks Tyler!

Exactly the answer I was looking for

Just to be sure, is this the type that will work in the high-voltage mode?

https://www.bhphotovideo.com/c/product/ ... m_ion.html

yup, i think that is the newer version! i am rocking the older versions, but those should work great!

I went with the Shape Full Play B-mount batteries, because they were less expensive and have a 299 watt/hour capacity. I ran my camera on one for close to four hours.

I don't know how accessible Shape batteries are outside of Canada at the moment though; in ordered directly from Shape. And also got a Shape 4-port charger.