UM Pro - ISO 3200 is bad + Snowflakes ??

Hi all

So I recently tested the new "ISO 3200" mode of the UM Pro. I was hoping, that in this update the noise will be handled better, but no, it was the same.

The vertical FPN is as present as ever, and of course far more visible now at 3200, than it was before at 1600. Of course, that is to be expected - the 3200 mode is just there if you really need it, no one expects it to be clean.

My observation though, revealed that even at ISO 1600, this new update does not improve anything noise-wise - the FPN is exactly the same.

Even more, there is one thing that really bothers me. At the 3200 ISO mode, the sensor exhibits an odd "Snowflakes" pattern - small white dots, that appear anywhere over a black background.

I am attaching 2 pics - one with added contrast and one regular "out of the cam" .
The pic out of the cam shows the usual FPN, but when I added contrast, I got these snowflakes...

Looks like stuck pixels to me. But you also added much too much contrast to the scene.

This is with Blackmagic RAW?

It is prores, but I dont think that raw has anything to do with fpn or stuck pixels. These are visible at 3200, but almost not visible at 1600. Arent these of too much quantity to be stuck pixels?

Try shooting the same test I. bRaw, the new 3200 was designed to be used with the new Raw format, to get the FPN fixed and noise reduction, from what others have reported.
Cheers

Yeah, what Denny said. That was added because the BRAW algorithm is generally cleaner and improves sensitivity.

Now, one wrinkle is that the P4K's ProRes actually incorporates some of the new BRAW tech, so ProRes on that came is cleaner/has a wider range than DNG (more or less--once you enable highlight recovery, DNG is comparable). I don't know that the UMP's ProRes has this added yet.

Alright that was interesting, these snowflakes are not visible in BRAW, but the vertical FPN is still bad at anything above ISO 800. 800 is good though

Emilian, have you concluded on your URSA Mini Pro 4.6K sensor with firmware 6.0 that ProRes is good at ISO 1600, but any flavour of raw should stick with ISO 800? That’s likely similar to the current sensor performance of the URSA Mini 4.6K Camera with firmware 4.8.


Sent from my iPhone using Tapatalk

My prediction:

To get good clean 3200 iso (maybe even higher), we have to wait till NAB next year when Ursa Mini Mark 2 will be announced. This camera will have dual sensitivity (normal and daylight) sensor.

Firmware updates can add BRaw, but can it do much about the inherent capability of the existing sensor? I am not too sure.

Ursa Mini 2, probably lol

rick.lang, I can conclude, that Prores or Raw does not make a difference about the FPN.

ISO 1600 will always exhibit strong FPN in dark areas. ISO 800 also has it, but it is manageable with LUT / contrast even without NR.

A bright / daylight scene will seem fine at 1600 ISO - the noise will be visible only inside dark areas.

Thanks, Emilian. Following other posts about NAB 2019, I wonder if BMD and Sony are cooking up something good together.


Sent from my iPhone using Tapatalk