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Rookie
Posts: 3
Registered: ‎11-05-2015
Message 1 of 9 (4,707 Views)

Hey, how can I avoid noise when shooting night time with Sony FS7?

Im shooting my first music video next week, and been wondering how to reduce noise. I've read many articles from various sites but wanna be sure. Should I shoot the video with or without S-Log3 ? It's gonna be at night time and I wanna be sure that the footage won't be noisy.. Thousands of thanks for answers.

Rookie
Posts: 2
Registered: ‎11-03-2015
Message 2 of 9 (4,689 Views)

Re: Hey, how can I avoid noise when shooting night time with Sony FS7?

If it were possible i'd do some camera tests beforehand in similar lighting conditions and see which settings give the best results.

When there's little to no light then SLog isn't always useful because you simply don't have your 14 stops of dynamic range in the real world, so why try to capture something that isn't even there.

All it does is scram all the dark picture information into the bottom of your gamma curve (where the noise is) and leave the rest unused.

 

You could try shoting in Rec709 or one of the Hypergammas, that all the depends on the actual light situation.

You can shoot these in Custom Mode and use the built in Noise Reduction if you wanted to, because you don't loose the SGamut colorspace in Cine EI which is needed for SLog gamma.

I'd only do that in documentary situations though, i prefer denoising in post when i have the time because it gives me more control.

Specialist
Posts: 60
Registered: ‎07-22-2015
Message 3 of 9 (4,655 Views)

Re: Hey, how can I avoid noise when shooting night time with Sony FS7?

[ Edited ]

I will start with ABNORM picture profiles with HG3 or HG7 with very luminouse lenses something like iris 0.9 to 2.0  (win one diaf with speedboster adaptator and canon mount for ex transtandard tamron 24-70 VC) you can win one more diaf if your shutter speed is setup to 25 for Pal or 30 for NTSC but mouvements must be very very slow (juddering). Setup recording  4K or 2K @ 50 or 60P for slowmotion X2).

Expert
Posts: 2,277
Registered: ‎11-23-2012
Message 4 of 9 (4,551 Views)

Re: Hey, how can I avoid noise when shooting night time with Sony FS7?

If it's dark and you don't need 14 stops of dynamic range then absolutely do not use S-Log. S-log is designed for one thing and one thing only and that's to maximise dynamic range. Low light is one area where log performs terribly.

 

Lets say your aperture is wide open. At the same ISO, if Rec-709 reaches 90% then S-Log will only be hitting about 25%, so 709 would be making use of 90% of the recording data available to you or about 800 shades, while S-log will only have about 100 shades with only the tiniest amount of information in the darkest shadows.

 

As already mentioned Hypergammas are a good compromise as the shadow and midtone data (and contrast) is similar to 709, it's only the highlights that are heavily compressed. My prefered Hypergamma for low light is HG3 as this has the brightest shadows and midtones for any given gain/ISO. That means you will maximise the amount of data in the shadows and midtones which then helps when you add any additional noise reduction.

Rookie
Posts: 3
Registered: ‎11-05-2015
Message 5 of 9 (4,472 Views)

Re: Hey, how can I avoid noise when shooting night time with Sony FS7?

Thanks a lot for your answer! I went with custom settings and the footage looks delicious!
Rookie
Posts: 3
Registered: ‎11-05-2015
Message 6 of 9 (4,468 Views)

Re: Hey, how can I avoid noise when shooting night time with Sony FS7?

Thanks a lot! The shootings went great.
Expert
Posts: 56
Registered: ‎10-01-2014
Message 7 of 9 (4,406 Views)

Re: Hey, how can I avoid noise when shooting night time with Sony FS7?

What if one would prefer to stay in CineEI? What LUT's to burn in a footage would you recommend to get best results in low light?

Expert
Posts: 2,454
Registered: ‎11-21-2012
Message 8 of 9 (4,367 Views)

Re: Hey, how can I avoid noise when shooting night time with Sony FS7?

In this specific situation, what is the advantage of burning in a LUT over using Custom mode?
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Nez
http://www.videosoul.co.uk/
http://twitter.com/watchvideosoul
Expert
Posts: 2,277
Registered: ‎11-23-2012
Message 9 of 9 (4,346 Views)

Re: Hey, how can I avoid noise when shooting night time with Sony FS7?

If it really is low light stay in custom mode where you have the benefit of built in noise reduction.

 

If you must use CineEI then use a low dynamic range LUT like 709(800).

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