UM46 vs UM46Pro - Noise Test

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Emilian Dechev

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UM46 vs UM46Pro - Noise Test

PostMon Nov 27, 2017 10:02 pm

Ursa Mini 4.6K VS Ursa Mini Pro 4.6K

Very under-exposed scene, shot at 1600 ISO, RAW 4.6K.

Both cameras set to the same Color temp (5600, 0) and black shaded prior to test.
Davinci Resolve, raw settings, + 5 exposure.

UMPro seems somewhat cleaner overall, but the vertical lines are a bit more pronounced.
UMpro noise has blueish tint.

UM46:

http://www.newactorsstudio.com/storage/UM46_EF.png

UM46 Pro:

http://www.newactorsstudio.com/storage/UM46_Pro.png
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rick.lang

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UM46 vs UM46Pro - Noise Test

PostTue Nov 28, 2017 10:15 pm

You may have seen my tests or John Brawley’s example where you can raise an exposure 5 stops and get a very usable image. This is more like 8? stops or more underexposed. Don’t think you’re going to raise that from the dead with only a raw exposure adjustment.

I do like how well my URSA Mini 4.6K camera holds up in these image comparisons. Not as ergonomic as the Pro but still an honorable combatant in the image wars.

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Emilian Dechev

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Re: UM46 vs UM46Pro - Noise Test

PostWed Nov 29, 2017 8:46 am

Of course I tried to shoot something very underexposed, almost black - to compare the noise pattern and FPN / vertical lines.

I think the FPN is more pronounced on the UM Pro, although the overall noise seems to be less.
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Uli Plank

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Re: UM46 vs UM46Pro - Noise Test

PostWed Nov 29, 2017 9:15 am

Confirms my own observations. I think the FPN is the same, but random noise is a bit less, so FPN is more obvious.
BTW a Scarlet MX has no visible FPN after tedious calibration, but more random noise.
That noise is more colorful too.
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rick.lang

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Re: UM46 vs UM46Pro - Noise Test

PostWed Nov 29, 2017 4:14 pm

Emilian, I’ve shot the URSA Mini 4.6K with the cap on the lens. That does show the most pronounced background noise pattern. Really ugly but your approach is probably better so you can see how the noise interacts with an object with very low light rather than no light.


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Jamie LeJeune

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Re: UM46 vs UM46Pro - Noise Test

PostThu Nov 30, 2017 4:01 am

Are you seeing noise in a properly exposed scene?
I just returned a defective Ursa Mini Pro with excessive noise under proper exposure due to hardware fault. Even after RMA it was noticeably worse compared to original 4.6K and so back to B&H it went. My third BMD camera that's been returned due to hardware problems. Details in the link:
https://forum.blackmagicdesign.com/viewtopic.php?f=2&t=66500
www.incafilms.com
http://www.imdb.com/name/nm4601572/

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