S-Log and Slomo

[Raymond Schlogel]

Wondering if anyone else has already tackled this with an easy solution. I got the upgrade to use S-Log on a night shoot, though the shoot went well and ultimately I got things looking right in post I hadn't realized until afterwards that S-Log doesn't work on slomo. Quite the little surprise. Has anyone made a picture profile that approximates the look of S-Log in these situations? Or is there some other better way to deal with this?

Thanks in advance!

- Ray

[Peter Corbett]

Did you come out of the SDI-A output to an external recorder? If you come out of the SDI MON output and have the monitoring LUT turned off, you get S-log 720P just fine.

[Raymond Schlogel]

Sorry, should have mentioned I was/am recording straight to SxS.

- Ray

[Ron Aerts]

huh?? S-log to Sxs internal? Is that possible?
I don't think so.

[Nate Weaver]

Originally Posted by Ron Aerts

huh?? S-log to Sxs internal? Is that possible?
I don't think so.

Yes it is, it's easy.

[Doug Jensen]

Originally Posted by Ron Aerts

huh?? S-log to Sxs internal? Is that possible?
I don't think so.

Yeah, it's possible. But not advised. If you're only going to record to the SxS cards, then you'd be a lot better off using a nice Picture Profile that won't require any extensive grading. To get the most out of S-LOG you really need at least a 10bit 4:2:2 recorder.

[Raymond Schlogel]

Appreciate the advice and to some degree Doug your reply is the answer that I'm looking for but minus the details, a picture profile that will emulate the look of S-Log for use in Slomo.

I've been working with the camera for a good long time now and though you or someone else smarter than I may have crunched some numbers that imply otherwise, to my eye S-Log even when just recording to the SxS card the image does have more latitude to it. And I certainly don't mind a little CC, in this day and age it seems pretty rare that footage doesn't get treated to some degree or another regardless. And I've always been one of those that shoots flat rather then risk baked in looks that I may or may not want to stick with in post.

- Ray

[Alister Chapman]

Firmware version 1.4 will allow you to use S-Log as a gamma curve which of course can then be used at any frame rate or shooting mode. Shouldn't have to wait too much longer!

I can't recommend S-Log for 8 bit either. Standard gammas give you about 25 grey shades per stop, S-log at 8 bit reduces that to about 18. Of course you can use s-Log like a conventional gamma and over expose it, but in doing so you loose much of the advantage it's supposed to bring. Correct S-Log exposure is about 1.5 to 2 stops lower than conventional gamma. That's how you gain the extra headroom. However it will look underexposed on a monitor that doesn't have S-log gamma.

If your not exposing S-Log correctly and exposing it like a conventional gamma then you don't gain much headroom and as Doug said would probably be better off using a cinegamma, especially if recording to 8 bit.

[Raymond Schlogel]

Just following up, did the 1.4 update ever get released? Not sure where to check on this.

Thanks!

- Ray

[Ron Wilk]

Originally Posted by Doug Jensen

Yeah, it's possible. But not advised. If you're only going to record to the SxS cards, then you'd be a lot better off using a nice Picture Profile that won't require any extensive grading. To get the most out of S-LOG you really need at least a 10bit 4:2:2 recorder.

Despite the lack of advantage of S-log recorded to SxS, am I correct in my understanding that any LUT engaged and thus passing through the SDI monitor port will be baked into the SxS recording as well?

[Chris Medico]

Originally Posted by Ron Wilk

Despite the lack of advantage of S-log recorded to SxS, am I correct in my understanding that any LUT engaged and thus passing through the SDI monitor port will be baked into the SxS recording as well?

Yes, that is correct.

[Joseph Anthony]

In answer to Ray's question, yes, version 1.4 was released and S-log is available as a gamma curve in your picture profiles now.

Firmware Version 1.4: Sony | Micro Site XDCAM

[Raymond Schlogel]

So finally got the update but confused. SLog is indeed available now in S&Q motion BUT even though in S&Q Motion as 1280/23.98 it won't let me go 60/24, only 30/24.

Anyone have a clue why? This seems to be only when SLog is enabled. I can do 60/24 when it off.

- Ray

[Douglas Villalba]

The f3 doesn't do 1080p60 internally and it only it with full slog upgrade out through dual link.

[Raymond Schlogel]

Well I had paid for the full upgrade but not sure if there was a separate one for those of us who paid, the 1.4 I got was from the link above. I'm aware it won't do 1080 but as I mentioned, this is 1280/23.98.

- Ray