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F5 & F55

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Top 40 Artist
starcentral
Posts: 1,175
Registered: ‎11-19-2012

various F55/F65 slog2 to REC709 LUTs samples

[ Edited ]

I applied these LUT's in Davinci without any further processing or correction to the image to give an idea of the different looks attibuted to them. Generally its a good idea to put a node before the LUT so you can adjust gamma or gain prior to applying the LUT.

 

A couple notes: The bluish tone is not the result of the LUT. I purposely set the camera for 3200k while using 5600k light to achieve a cooler look as the final grade will be set for a moonlight look. My exposure is quite low. ie. in slog2 my skin was in low 30% range and nothing "white" over 60% IRE. Thankfully I had a decent LCD monitor attached because at these low levels the OLED VF is absolutely useless.

 

(click on any image to open full 2k version) 

original frame shot in slog2 + sgamut

 

slog2 to Rec709 version 1 (LUT posted by Sony in March 2013)

 

1D slog2 to Rec709 LUT built into Davinci v9 or higher

 

slog2-sgamut to Rec709 LC709 (Released June 2nd 2013 by Sony)

 

slog2-sgamut to Rec709 LC709 Type A (Released June 2nd 2013 by Sony)

 

slog2-sgamut to Rec709 Cine+709 (Released June 2nd 2013 by Sony)

 

Other LUTS:

starcentral LOW CON 01 LUT (available for free download)

 

starcentral GOLDEN TEXAS LUT (available for free download)

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Tuning Up
moshe_mishali
Posts: 2
Registered: ‎10-20-2014

Re: various F55/F65 slog2 to REC709 LUTs samples

Hello 

 

Is it possible to get the "LC 709 TYPE A" look as a LUT for offline editing or as a reference for the grading proccess?

 

Thanks 

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Top 40 Artist
starcentral
Posts: 1,175
Registered: ‎11-19-2012

Re: various F55/F65 slog2 to REC709 LUTs samples

[ Edited ]
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Tuning Up
moshe_mishali
Posts: 2
Registered: ‎10-20-2014

Re: various F55/F65 slog2 to REC709 LUTs samples

Thank you,

thats exactlly what i was looking for.

mosh

 

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Emerging Star
Tom_Roper
Posts: 34
Registered: ‎12-30-2013

Re: various F55/F65 slog2 to REC709 LUTs samples

Dennis, if you used the (SLog2-SGamut to LC709A) as an output lut in Resolve, would you get the same final picture as if you had used SLog3-SGamut3.Cine to LC709A? In other words, both output luts in theory should be transposing their respective gamma/gamut tables into 709 color space, adjusted for low contrast and Alexa hues, so that they look the same even though they started out being recorded very differently.

 

As a companion question, if you selected the SGamut3.Cine_Like matrix from the custom mode in order to gain access to the noise reduction, would you get the same picture from the matrix gamma as the EI gamma if  the (SLog3-SGamut3.Cine to LC709A) was output lutted in post?

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Top 40 Artist
starcentral
Posts: 1,175
Registered: ‎11-19-2012

Re: various F55/F65 slog2 to REC709 LUTs samples

I have never tried it so it would need to be tested. DP Art Adams recently did some video tests comparing gamut vs gamut3 and there were differnences in color in the output. I have to imagine that alone might contribute some different, and not sure if the LC709A LUT has the color transform necessary to bring images from each gamut to the same place.

 

As always I would suggest you setup a simple test with some flowers, a model (skin tone) and macbeth color chart and try both. It would be interested to try, perhaps someone else already has and can post some comments or results.

 

Here is Art's article:

http://www.dvinfo.net/article/acquisition/sonyxdcam/my-cinegear-presentation-on-the-sony-f55-part-1....

 

As for second question, it is tricky. In custom mode you would have to disable matrix, detail settings, etc.. to get the similar processing as in the CineEI mode where much is disabled... but you would benefit from the Noise Reduction of course, which could be nice to have.

 

I haven't tried any of these "tests" so really speaking of high speculation.

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Emerging Star
Tom_Roper
Posts: 34
Registered: ‎12-30-2013

Re: various F55/F65 slog2 to REC709 LUTs samples

[Quote]

This is a great comparison of SGamut and SGamut3.cine, and a demonstration of how the underlying characteristics of your chosen color gamut always affects the LUT you impose on it. For example, SGamut makes William’s face seem redder than it really is, and it exaggerates the red in Kelly’s face as well as making her appear yellowish in Cine + 709. SGamut3.cine always renders flesh tones more neutral and less red, even in Cine + 709 where warm tones are deliberately emphasized by the yellow cast.[/quote]

 

Art's answer is that the underlying characteristics of the chosen color gamut will always affect the lut you impose on it.

 

Thanks Dennis.

 

Tom

 

 

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Emerging Star
Tom_Roper
Posts: 34
Registered: ‎12-30-2013

Re: various F55/F65 slog2 to REC709 LUTs samples

The matrix settings inside Custom mode include one called (Sgamut3.Cine-Like). If you shoot SLog3 in Custom mode, and that gamut really is "like" Sgamut3.Cine is for EI mode, then the Sony 3D output lut (Slog3_Sgamut3.Cine to LC709A) should work the same in post for footage shot in EI or Custom mode. And I think it is close. It was hard to be absolutely certain as I was shooting outdoor footage at dusk, so the light was changing, and I was making exposure changes as well.

 

I was using LC709A look as an Mlut on the F55 for setting exposure. The noise if there was any, was minuscule at most in EI mode. I couldn't see any improvement or even a difference in Custom with NR on low, and EI1250  looked as clean as EI640, my $0.02.

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Top 40 Artist
JohnD2013
Posts: 63
Registered: ‎07-18-2013

Re: various F55/F65 slog2 to REC709 LUTs samples

[ Edited ]

My favorite is the start central low con 01 lut.  I  like the detail you can see on the soldiers head lower left.

 

Hey Dennis, you said " Thankfully I had a decent LCD monitor attached

Can i ask you what monitor you are using, I really need to find a good monitor.

 

Thanks for all the many hours I know you spent on this.

People like you make this site the best.

John

 

 

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Top 40 Artist
starcentral
Posts: 1,175
Registered: ‎11-19-2012

Re: various F55/F65 slog2 to REC709 LUTs samples

[ Edited ]

Thanks for the kind words.

 

I used the ikan D7W 3G HD monitor - now I believe discountinued and replaced with a newer model. What was great about it were the slew of exposure tools, and the resolution is actually quite high for an HD monitor so myself along with other focus pullers are able to pull focus using this monitor while shooting in 4K without any extra focus tools enabled ie. like peaking for example.

 

I still use this monitor to this day and also put it on my steadicam for certain projects.

 


Here are some other frame grabs from the final colored and graded film, it screened at a few film festivals as well won BEST SHORT film at a local horror film festival.

 

 

 

 

 

 

Here is a copy of the final film if anyone is interested to watch it. It was the VERY first project I graded in Davinci Resolve and as mentioned the VERY first project I shot shortly after receiving the F55 so overall I'm pretty happy with it. Of course there are always certain things I wish were a bit different but....

 

Watch in HD click here: http://vimeo.com/90466779

 

[video]

 

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