Attila Bakos

I didn't pay too much attention to this video, until I noticed the same:

It doesn't really bother me as it took months to shoot a scene where I actually noticed it, but I wonder what's the explanation for this issue.

16 minutes ago, androidlad said:

From LUTCalc data.

HLG was not designed to be an acquisition format, the curve is extremely non-linear and hard to grade manually.

I think HLG does offer a bit more shadow detail due to its efficient use of all available bits, compared to F-Log's more compressed tonal range (elevated black level). 

I'm really starting to like HLG more, mostly because the new colorimetry, it's more clean and neutral.

But in LUTCalc you can choose between NHK / BBC reference white scaling, and the BBC one gives you 38% IRE for 18% grey, which I believe is closer to what's happening in the X-T3 when you let the camera figure out middle grey. I filmed a lastolite middle grey background filling the entire frame and I could only see about 10% IRE difference between F-Log and HLG.

18 hours ago, androidlad said:

BT.2100 HLG maps 18% grey at 22% IRE

Where do you get the 22% from? I couldn't find it in the specs.

I also did my tests with the X-T3 when the update arrived. I used ETTR and placed highlights at the exact same level near clipping, then pushed shadows to the same level in post. Overall noise level was identical, and to my surprise I could get a little more detail out from the shadows of HLG even though they appeared more crushed. The difference is very little though, I wouldn't base my choice on it. I've chosen to stay with F-Log, because I learned to work with it in the past and I find it easier now.

54 minutes ago, thephoenix said:

Sure It has nothing to do with fuji af. Would probably need to use It manual  but It has stabilization and 2.8 

Might answer my needs for handheld  

Not sure if it matters to you, but the body corrects for CA, vignetting, and distortion when you use the Fuji lens. You won't have that with the 17-50.

1 hour ago, DBounce said:

What lens? Or do you mean body cap? What ISO?

Lens doesn't matter, and use native ISO for N-log, whatever that is.

Oh and could you make a second one with lots of clipped highlights?

Thanks!

I ask again, maybe with more success this time, can anyone with a Z6/Z7 and an external recorder shoot a short clip (few seconds) with the lens cap on and upload it somewhere? I'd appreciate it.

Good news for Windows users: https://theblog.adobe.com/adobe-pro-video-apps-now-support-prores-export-on-windows/

11 minutes ago, Snowbro said:

I havent had the camera in "boost" mode. Will that improve the video AF or anything else pertinent to video?

I don't have my X-T3 with me to confirm it, but check page 212 here: http://fujifilm-dsc.com/en/manual/x-t3/x-t3_omw_en_s_f.pdf

Interesting results from Slashcam: https://www.slashcam.de/artikel/Test/Der-4K-Vollformat-Herausforderer-Nikon-Z6---Bildqualitaet-im-Videomodus.html

Among other things, they doubt that it's a full sensor readout in 4K, and also there is a slight crop when using N-Log.

Just now, Emanuel said:

Well-asked request. An effective way to address further inspection on it : -)

I'm developing something for N-Log and I'd like to see where blacks are mapped.

4 minutes ago, Emanuel said:

Not Ninja V, but with Inferno (Z7 running firmware 1.0) :

https://www.dropbox.com/s/kgtgezwqaayinb2/Z7 N Log 4k.mov?dl=0

courtesy by Jeff Curtner

Thanks, I already have that one That seems to be the only one available on the net. Something else would be great then

@DBounce On a second thought, I would be happy if you could share a short footage shot with the lens cap on.

8 hours ago, DBounce said:

Had a quick play today shooting some video, both internally and to the Ninja V. I believe the footage is pretty flexible and can be graded without too much difficulty to match the C200.

Can you please upload some untouched N-Log footage? Straight out of the Ninja. Anything works.

38 minutes ago, androidlad said:

On the regular 5in Video Assist, there's a "HDMI Range" setting that allows you to specify the range of input signal. It's very simple for Atomos to implement this, instead of treating all input signal as video range.

ProRes can contain either full or video range data, it just need to be specified in the metadata header.

Well, the 4K version doesn't have that. And I graded X-T2 F-Log files coming from the BM Video Assist 4K, one of the Atomos recorders, and the Convergent Design Odyssey 7Q+, they were all video range. It's really not a problem of Atomos, altough I imagine it would be fairly easy to implement what BM did on the smaller Video Assist.
I'm not sure if Prores has flags for full or video levels. I've never seen a full range Prores 422 for example. I'm on Windows so I could only try ffmpeg, but the Prores implementation ignored my level scaling parameters.

20 hours ago, androidlad said:

It's a known unresolved issue for many years, Atomos applies a forced data range to video range scale regardless of the actual range of the source, clipping highlights and crushing blacks, making the images look more contrasty. Fortunately the range can be mapped back in post, as demonstrated in previous posts.

Are you really sure that it's an issue with Atomos? My X-T2 recorded in-camera F-Log as data range, but when I used it with the Blackmagic Video Assist 4K, it recorded in video range, levels went up to 109% IRE. It's also worth noting that Prores is assumed to be video levels, except for Prores4444 RGB. As long as the data is there just mapped differently, I wouldn't worry. In Resolve it's just a few clicks to map it back to data levels, in other NLE's or on the recorder itself you can use a LUT for that. I can create such a LUT if anyone's interested.

Did anyone find downloadable N-Log material yet? I'd like to have a look at untouched, unprocessed clips.

I tried the article links from different computers/IPs, even from different countries, all goes to 404. Something is wrong with his site atm.

2 minutes ago, androidlad said:

 Cool. Nope who's that

Someone who goes by the name Lucas Mason on LiftGammaGain forums and is using the exact same profile picture He used the name Luke Mason here and has the same style as yours Busted?

3 minutes ago, androidlad said:

X-T3's F-log introduced some small but obvious changes in its colorimetry. X-T2's LUTs aren't fully compatible.

I know, that's why I'm creating new ones. BTW you're Luke Mason right? Why did you create a new account?

5 hours ago, thebrothersthre3 said:

Yes! I am excited for HLG. Also looking forward to using film simulation luts to monitor log. I wonder if they will have more luts for vlog other then eterna(classic chrome maybe?)

I will have Check the ones available for the X-T2 at http://colorizer.net. You can also try them for the X-T3's F-Log. Just make sure to switch footage to use video levels. 

Details of the next update coming in December: https://www.fujirumors.com/fujifilm-announces-firmware-updates-for-fujifilm-gfx-50s-fujifilm-x-t3-and-fujifilm-x-h1/

9 hours ago, androidlad said:

I think it only records fine because the camera has a large buffer (for 30fps stills shooting).

Noticed a strange phenomenon today, when using the touchscreen to pull focus in video during recording, in AF-S mode, a touch would only half focus on the subject (focusing starts slowly and stops midway). In AF-C mode it works wonderfully though, locks dead on almost every time. But AF-C focuses everywhere the focus box goes and does not offer much control vs. AF-S.

Anyone experiencing the same?

@Cameramoto

@Attila Bakos

Yes, I have the same problem, didn't find a solution yet.

I had the same problem a few hours after my purchase. The unit did not turn on, battery pull didn't help. It turned out one of my Lexar 2000xs broke inside the camera. I removed the card and did another battery pull and the unit powered on again. 

17 hours ago, omega1978 said:

Can anyone say if when recording in 4k50p after 20 min you must wait or you can start immediatly to record again

You can start immediately but the camera gets hot in 4K50 mode, I had heat warning at 25 mins when I last checked it. I think it's advisable to wait.

49 minutes ago, IronFilm said:

Sorry. I couldn't resist asking when  you said you're from Cairo.... 

Haha, we never forget.

I don't see it mentioned anywhere, but the FHD mode seems to have a very slight crop compared to 4K.