Comments on: Blackmagic URSA Cine 12K LF Lab Test: Rolling Shutter, Dynamic Range, and Exposure Latitude

By: Jonathan Pais

Jonathan Pais — Wed, 27 Nov 2024 14:03:34 +0000

In reply to No BS Here. Couldn’t agree more.

By: Ajay Kumar

Ajay Kumar — Mon, 25 Nov 2024 09:06:21 +0000

Good

By: Thatcher Freeman

Thatcher Freeman — Sun, 24 Nov 2024 18:10:34 +0000

In reply to Cinetech. Thanks for the link, I think that settles the debate :)

By: No BS Here

No BS Here — Sun, 24 Nov 2024 17:46:23 +0000

In reply to Dam Yam. That’s BS

By: Cinetech

Cinetech — Fri, 22 Nov 2024 10:08:14 +0000

In reply to BOUNCE.

How can 14 bits beat ARRIs 18 ? : )

Not sure why the 12 bit limit in R3 and R1 for cinematography, sensors can handle 14 bits in 40fps. I’m deducing buffer route is because uncompressed 14 bit 6K RAW can’t go directly onto media and RAM can handle it.
Perhaps the reason for 12 bit limit lies in processing or heat or media minimum sustained write speed limitations.

Suggestion – compare R1 DR in 12 bit Cinema RAW and 14 bit stills.

It should outperform A9III DR and sensitivity…

By: Cinetech

Cinetech — Fri, 22 Nov 2024 10:03:02 +0000

In reply to Thatcher Freeman.

Okay here you go and read if this makes sense putting on a camera sensor on micro scales or they can just use larger pixels and higher A/D bit depths.

https://www.analog.com/en/resources/analog-dialogue/articles/logarithmic-amplifiers-explained.html

By: N Shea

N Shea — Thu, 21 Nov 2024 19:20:49 +0000

What were the DR results when the camera was run in 8K mode? Most people are going to run this camera in 8k or 4k, to save on data and get the better rolling shutter.

By: Thatcher Freeman

Thatcher Freeman — Thu, 21 Nov 2024 07:17:29 +0000

In reply to Cinetech. "log amplifier" is a great Wikipedia article. William's comment was the first I had heard of it, and I was hoping he would comment on some of the risks described in that article, being the temperature sensitivity, for one So it seems that such a circuit does exist, but it is never used in cameras as far as I can tell

By: Robert M

Robert M — Wed, 20 Nov 2024 17:21:25 +0000

Regardless of price, it’s impressive that it’s a clear competitor to the LF or Venice. Factor in the price and it’s really quite remarkable. Nevertheless, in my opinion, the real elephant in the room here is the URSA Cine 17k 65, which uses a larger version of the same sensor and should have identical performance. That camera seems to me to be a true game changer and “could” profoundly start a new 65mm revolution where you no longer need to rent an ALEXA 65 to pretend you’re Christopher Nolan.

By: Cinetech

Cinetech — Wed, 20 Nov 2024 11:30:12 +0000

In reply to Thatcher Freeman.

“22 bits of data total” sounds sexy but is divorced from context and context is bit depth you get in constructed image data. In reality 2×11 bits offset by stop or two of gain and joined in 16bit (according to John Brawley info). Which also doesn’t mean there are 16 bits of constructed image data.

I know this isn’t Misha’s claim, I have read the document. : )