Author Topic: Free Ektar 100 LUT for Magic Lantern footage  (Read 22498 times)

jankrueck

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #25 on: April 13, 2017, 06:20:18 PM »
I dont know what I do wrong,
but mny output is far away from what you guys show off :D

I tried to:

Import cDNG into Resolve -> timeline Alexa C-Log -> LUT -> way to yellow image
Import cDng to ACR -> bmd camera setup (payed converter) -> save as tif -> import to resolve -> LUT -> way to dark image
Import cDng to ACR -> VisionLog Camera Settings -> save as tif - import to resolve -> LUT -> kinda ok developed, but not near to the look you show

any idea?

thanks, Jan


ps: im working on cc2017, if this is of any interest

Kharak

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #26 on: April 13, 2017, 07:25:47 PM »
He writes the lut is for Cinelog-c, if you dont have cinelog-c then Log-C is the closest. Add some saturation and increase exposure or vice versa. Cinelog-c is made to resemble Log-C so you can get good results with the lut. But to get a more natural look, you could change the hue on the green. The Ektar film has a lot of Yellow bias in the greens its the way its supposed to look.
once you go raw you never go back

hyalinejim

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #27 on: April 14, 2017, 01:38:26 AM »
For this lut (and generally any look lut) you need to adjust white balance and exposure before the lut.

So if things are too yellow, lower the colour temperature. Too magenta, change the tint. Underexposed, raise the exposure (I like curves for this one as you can quickly set whites, blacks and midtones). Too saturated, lower the saturation.

These are best done before the lut, but you can try some of them after the lut as well.


Import cDNG into Resolve -> timeline Alexa C-Log -> LUT -> way to yellow image

Import cDng to ACR -> bmd camera setup (payed converter) -> save as tif -> import to resolve -> LUT -> way to dark image
Import cDng to ACR -> VisionLog Camera Settings -> save as tif - import to resolve -> LUT -> kinda ok developed, but not near to the look you show


For Resolve, try a different white balance.

For ACR, forget VisionLog and BMDFilm - you need Cinelog C here. It's not so expensive. The combo of ACR (best debayering) and Cinelog C (retain all dynamic range, keep noise under control and play nicely with Alexa luts) is a winner as far as I'm concerned. But if I'm short on time I use Resolve.

Thanks to everyone for trying this out. For those who are digging it I'll make more soon. I'm in Bali at the moment on holidays. The light is amazing. I brought my XC10 and just befire I left I made an Ektar lut for that as well. It totally brings the XC10's colour to a new level.

DeafEyeJedi

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Free Ektar 100 LUT for Magic Lantern footage
« Reply #28 on: April 14, 2017, 07:17:25 PM »
For this lut (and generally any look lut) you need to adjust white balance and exposure before the lut.

Agreed.

Quote
So if things are too yellow, lower the colour temperature. Too magenta, change the tint. Underexposed, raise the exposure (I like curves for this one as you can quickly set whites, blacks and midtones). Too saturated, lower the saturation.

Took me awhile to figure out why things were slightly yellow during my early days of using Cinelog-C few years ago (even tho I had set the Kelvin's the way I like from how it looks by double checking in ACR color profiles to CinelogRec709 temporarily for WB correction if needed).

However, Curves are the way to go when it comes to exposures along w the whites, blacks & midtones without creating flickering in post.

Quote
For ACR, forget VisionLog and BMDFilm - you need Cinelog C here. It's not so expensive. The combo of ACR (best debayering) and Cinelog C (retain all dynamic range, keep noise under control and play nicely with Alexa luts) is a winner as far as I'm concerned. But if I'm short on time I use Resolve.

ACR + Cinelog DCP is the mother combo of all and always has been. Cinelog DCP 2017 hasn't been updated yet for Resolve but w the previous version works just fine when timing is tight for quick turnarounds.

It is definitely noticeable differences in quality between those two algorithms though. Even at ProRes4444XQ. There are reasons why ACR takes longer.  :D

Quote
Thanks to everyone for trying this out. For those who are digging it I'll make more soon. I'm in Bali at the moment on holidays. The light is amazing. I brought my XC10 and just befire I left I made an Ektar lut for that as well. It totally brings the XC10's colour to a new level.

Have you seen this yet re: XC10?



http://ntown.at/2017/02/20/list-of-most-popular-canon-sony-panasonic-camera-base-luts/
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DanHaag

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #29 on: April 20, 2017, 04:18:05 AM »
This LUT is the best I've ever tried with ML raw. Gonna use this a lot, thanks so much for sharing!  8) :)

hyalinejim

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #30 on: April 24, 2017, 04:20:57 PM »
Hi everybody who's enjoying the Ektar lut. I've made a new version that I've called TWISTED:







Link is here:

https://drive.google.com/file/d/0B1exEpCRAfgFV3dtbjl1VGRCRWc/view?usp=sharing

Why is it twisted? Not because it's morally deviant, like you. But because there's a subtle hue twist from shadows to midtones to highlights which more accurately models the colour rendition of some of those Ektar scans I found.

In real terms it's subtle and doesn't make a huge difference, but the effect is there. What you will notice, however, compared to the previous LANDSCAPE lut, is that blues are more vivid and reds are ever so slightly less hot. Greens are still psychologically accurate. Also, when you first apply it, the white balance is more neutral - previous versions were skewed towards pink because that's the effect I was trying to recreate. You can still get the pinky pastel look with this version by manipulating tint before the lut. Have fun!

This LUT is the best I've ever tried with ML raw. Gonna use this a lot, thanks so much for sharing!  8) :)

Saw your vid from the Berlinale talks - looks great!

Have you seen this yet re: XC10?

I wasn't aware of that. Thanks for pointing it out!

Oedipax

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #31 on: April 25, 2017, 02:02:10 AM »
Question about using Arri Log C as your timeline display LUT w/ Resolve - when I go to export files that I've graded this way, the timeline display LUT isn't baked in to the exported image. So I get washed out colors and so on, very different from what was in Resolve. Note I'm not talking about the usual prores gamma shift, it's literally just not applying the first of the two LUTs on export. Is there an option on export I need to flag?

Very cool LUT by the way, using it on some 5d3 3K stuff right now and it's very nice.

hyalinejim

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #32 on: April 25, 2017, 02:41:04 PM »
Ok. Here's the Ektar lut of all luts, the Mother LUT if you will. I'm calling this one ADVANCED:







(Images sourced at kleptography because I'm bored of using my own....   http://www.kleptography.com/dl/5diii/raw/)

Download ADVANCED lut here:

https://drive.google.com/open?id=0B1exEpCRAfgFbTBFMkdzZHdTVEU

So what's different about this one? The colour is the same as TWISTED but instead of using a nice, user friendly gamma curve this lut accurately emulates the complex curve of the Ektar scans I found, including how contrast is altered when the exposure is pushed or pulled. This means that it takes a little more work on your part to get a good looking image. When you first apply the lut you probably won't get a nice result - it's very contrasty and may be severely over or under exposed. Think of the lut as part of the development process rather than an end in its own right. I recommend this order of operations:

1. White balance (temperature and tint)

2. Pre Curves - try raising and lowering white and black points and midtones to reveal the tonal information or contrast profile you're interested in. Watch the waveform and notice how contrast and colour shifts at different IRE levels. It might be necessary to over or under "expose" at this stage, or even to send a very low contrast input into the lut - just as you might push or pull an exposure when developing film. Be creative here.

3. ML Cinelog-C to Ektar 100 ADVANCED lut

4. Post Curves - now use curves again to correctly set blacks, whites and midtones.

5. Saturation - this version has a lower saturation than previous versions, so you might want to add a little here.

So basically, the TWISTED lut is the easiest to use and gives most pleasing colour and tonality with only a few clicks. It works great on every clip I've tried it on and I'll probably use it for 99% of my work.

Nevertheless, this ADVANCED lut is actually amazing if you take the time investigate how it works. It can give results that are remarkably similar to film in terms of colour, saturation and contrast, but you have to work at it!

Question about using Arri Log C as your timeline display LUT w/ Resolve - when I go to export files that I've graded this way, the timeline display LUT isn't baked in to the exported image.

I'm not a Resolve expert but I think timeline display luts are only for monitoring and so aren't exported. So that would be normal behaviour.

beauchampy

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #33 on: April 25, 2017, 04:22:39 PM »
Bless you hyalinejim, this is fantastic work. Can't wait to give it a try.

Danne

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #34 on: April 25, 2017, 04:31:16 PM »
Not bad. I use it with cr2hdr.app by simply throwing it into the ProRes4444 folder when exporting to ProRes. Cineon log x your ektar. Of course lacks the possiblity to change the contrast etc.
How do you build you 3D lut? It´s always nice to have the ready result but it´s even more interesting to follow how the lut is done.

hyalinejim

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #35 on: April 25, 2017, 05:30:56 PM »
Bless you hyalinejim, this is fantastic work. Can't wait to give it a try.

Hope you get results that you like!

How do you build you 3D lut?

I'm learning all the time. This is what I did to build these luts

Find a photo of a colour chart taken on film:



Take a photo of the same chart



Crop, reduce noise, blur and extract squares.

Ektar:


Cinelog C:


Use curves in Photoshop to match gamma (colour picker on the grey squares for each photo, write it down and manually type in the values for input and output)



Bring both images into Resolve and overlay one over the other. We want to match the ML with the Ektar



Use https://generator.iwltbap.com/ to convert the Photoshop curve to a lut and add that as a first node



Use hue v hue to match hue, using the vectorscope angles as a reference



Use hue v sat to match saturation, using the vectorscope lengths as a reference



So, for the first few versions of the Ektar lut posted, I didn't match the gamma... only the colours. This is because I had independently found a nice gamma that's easy to work with. For the twisted luts I actually created 3 luts - highs, midtones and shadows. Then I applied those to three HALD files, as per the IWLTBAP link above, and used "blend if" in Photoshop to merge the 3 luts together. The last lut I posted, ADVANCED, has a different curve and colour response in the highlights, midtones and shadows.


Danne

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #36 on: April 25, 2017, 06:05:28 PM »
This is some very nice stuff. Thanks so much for sharing techniques. Interesting lut generator. Definitely gonna check that one out.

hyalinejim

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #37 on: April 25, 2017, 06:10:38 PM »
Thanks Danne, I'm just happy to be able to give something to the ML community.

IWLTBAP lut generator is great for creating luts from any application that can load and export a JPEG or PNG. Of course, in Resolve you can right click on a clip and export its corrections as a lut. I'm using a combination of both here.

PS: This technique also works pretty well for matching cameras. You don't even need to buy a chart - just do up some colour and greyscale squares on your monitor and shoot that.

Danne

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #38 on: April 25, 2017, 06:53:28 PM »
Yes, been looking for such a hald lut processor. Really cool.
While we´re at it don´t miss out on Ben Turley´s lut calculator
https://cameramanben.github.io/LUTCalc/

Another fine effort is ML user so-rose wip here
https://pypi.python.org/pypi/openlut

DeafEyeJedi

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Free Ektar 100 LUT for Magic Lantern footage
« Reply #39 on: April 25, 2017, 07:32:28 PM »
I'm learning all the time. This is what I did to build these luts

Best LUT porn ever and thanks for sharing your experience!  ;D

Find a photo of a colour chart taken on film:

How exactly did you get ahold of this photo? Very nice, indeed!

Quote
So, for the first few versions of the Ektar lut posted, I didn't match the gamma... only the colours. This is because I had independently found a nice gamma that's easy to work with. For the twisted luts I actually created 3 luts - highs, midtones and shadows. Then I applied those to three HALD files, as per the IWLTBAP link above, and used "blend if" in Photoshop to merge the 3 luts together. The last lut I posted, ADVANCED, has a different curve and colour response in the highlights, midtones and shadows.

Ah, that's definitely interesting and sure makes sense with why the recent TWISTED version feels so candy and I'm definitely going to use this one for batch processing together with Cinelog-C all within @Danne's latest cr2hdr.app from here on out for the time being!

Re: ADVANCE version is rather tricky to work with (Thanks for making it this way) otherwise we could easily bore our way out from not utilizing our creativeness by relying on the others (LANDSCAPE, TWISTED) too often. This is a game changer and probably the most challenging LUT of all three. For good reasons, obviously!  8)

*edit*

I just noticed something noteworthy after taking a peek at http://www.kleptography.com/dl/5diii/raw/ and if you scroll down to look at his photos and read the spec/settings used for each shot...

Especially the Exposure Compensation which was mostly if not all taken in -1/3 underexposed to accommodate for that certain gamma curve look, however, I am not sure if we should take this into practice when it comes to shooting in MLV RAW. Might be worth to experiment after all.  :P
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Lars Steenhoff

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #40 on: April 25, 2017, 08:12:52 PM »
why in 2017 cant photos camera support LUTs internally, only expensive video cameras have support for them.

It would be so cool to just usa a LUT in the 5d mk3 and have a nice preview on the screen for reference.

Oedipax

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #41 on: April 25, 2017, 08:49:43 PM »
Quote from: hyalinejim
I'm not a Resolve expert but I think timeline display luts are only for monitoring and so aren't exported. So that would be normal behaviour.
Appreciate the response (and the LUTs)!

I guess my question is, for anyone who is using Arri Log C as a Cinelog C substitute in Resolve - how are people able to export with the grade intact?

hyalinejim

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #42 on: April 26, 2017, 03:20:14 PM »
How exactly did you get ahold of this photo? Very nice, indeed!

I just googled "colorchecker ektar" or something similar.

Quote
ADVANCE version is rather tricky to work with

Absolutely! I went out this morning and took a lot of photos to test out the lut. It works well out of the box about 10% of the time  ;D Try this version 02 instead:

https://drive.google.com/file/d/0B1exEpCRAfgFaGpDOTh4VVQxSWs/view?usp=sharing

In the first version of ADVANCED I was trying to make it work a bit better by adding a curve before the lut to raise blacks and lower the whites a little. But I see now that it doesn't work too well as the blacks get murky. ADVANCED v02 is actually the pure lut itself without any of my fiddling. It's even more contrasty, but I think I'm beginning to see how to get good results fairly easily in the first exposure adjustment. Here's the order of operations:

1. Colour temperature & tint
2. First exposure adjustment
3. LUT
4. Second exposure adjustment
5. Saturation

So in step 2 here's how to get quick results for normally exposed footage:

Option A: Curves - bring down the whites until highlights sit at around 80 to 90 IRE. Now grab the middle of the curve, raise it and wiggle it around. Blacks should be OK but if they get lifted you can bring them down again later.

Option B: Classic exposure adjustment (lift-gamma-gain or similar) - lower the gain and raise the gamma. For example, in After Effect's Offset effect, exposure -0.75 and gamma 1.15 is a good starting point.

Let me know how this works out! I'm really intrigued by the ADVANCED lut as it just looks so goddamn like film!

I apologise for the wall of images, but it was quite quick for me to get this range of results using the above method:







































Danne

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #43 on: April 26, 2017, 03:26:02 PM »
Those  images looks great. Good progress.

hyalinejim

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #44 on: April 26, 2017, 04:20:29 PM »
There's something about the ADVANCED 02 that gives the a really nice filmic contrast... if you can get it to work right!

I guess my question is, for anyone who is using Arri Log C as a Cinelog C substitute in Resolve - how are people able to export with the grade intact?

Try these settings to get a close-ish match to Cinelog-C from ACR:




The colour won't be exactly the same (ACR just has nicer colour) but the gamma should match more or less.

EDIT: Or you can leave the output lut blank and add whatever lut you want as a node. This way you have control of the image after the lut.

Tom_LS

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #45 on: April 26, 2017, 07:01:50 PM »
Hi, thank you for sharing your work. Your footage looks amazing. I'm new, so work with LUTs is bit difficult for me. My original files looks:


and when I apply your the newest LUT:


I tried follow your tips (change exposure, and saturation, etc.), but my result wasn't good. What I do wrong or maybe it is too difficult for beginners?

hyalinejim

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #46 on: April 26, 2017, 07:59:01 PM »
I tried follow your tips (change exposure, and saturation, etc.), but my result wasn't good. What I do wrong or maybe it is too difficult for beginners?

First of all, make sure your project settings are exactly the same as what I posted above (except for output lut - just leave that blank as we'll add the lut in a node for each clip for more precise control, rather than setting it as an output lut)

So here's a DNG debayered into Log-C using the project settings posted above


Add the lut to a node


This is the result


Not too bad in this case but maybe a bit too bright and contrasty. So let's try a curves node before the lut. I'm going to bring down the whites and raise the midtones


Here's a similar approach using gamma and gain instead of curves


OK. I'm happy with the tonality but want to cool it down a bit so I "unlock" the Camera Raw controls by setting Decode Using to Clip and White Balance to Custom


Now I add a node after the lut to tweak the blacks


And add a small amount of saturation


Voila! And this is the same process using ACR Cinelog-C to After Effects








Tom_LS

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #47 on: April 26, 2017, 08:51:18 PM »
First of all, make sure your project settings are exactly the same as what I posted above (except for output lut - just leave that blank as we'll add the lut in a node for each clip for more precise control, rather than setting it as an output lut)

Thank you for your response, but I still have issue. I noticed that i can't choose Input and Output colorspace.






My DNG "burns" when I change Decode- Using Clip (Blackm...Design, Blackm...n Film)> Project

hyalinejim

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #48 on: April 26, 2017, 09:00:44 PM »
I think I see the problem! You're stuck on a Rec709 gamma for input out and output colour spaces but they both should be set to bypass. You should switch these settings and it should be ok:






Deadcode

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Re: Free Ektar 100 LUT for Magic Lantern footage
« Reply #49 on: April 26, 2017, 09:13:09 PM »
My settings are exactly the same, but i still getting the contrasty REC709 look.