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Thank you Alister, do these apply to the FS7 (II) as well?
No, FS7 is different. 800 ISO for STD and HG1 to 4. 1600 for HG7/8 and 2000 for S-Log.
Does native iso remain the same at 1080 through to 4K?
I guess I could work this out myself if I toggle between gain and iso in diplay info.
Yes it remains the same.
Hello Alister,
Does using dB setting makes the camera automatically use the native ISO for each gamma curve?
Thank you!
If you are at 0dB the yes. Much simpler.
Hi Alister, can you explain what is the purpose of ITU709 800%? Is this meant to be used as a normal shooting mode as an alternative to normal ITU709? If I’m submitting footage directly to a network would it be a good or bad idea to use this gamma? (Ignoring that it might go over 100% level). I can’t find anywhere an explanation of what this gamma is meant for so if you can help explain that would be much appreciated cheers
709(800) was designed for use in LUT’s as a way to monitor a large part of the 14 stop S-Log range. Below 80% it’s pretty much vanilla Rec-709, above 80% an additonal 5 stops are squeezed into a large highlight roll-off. This results in flat highlights, but a decent amount of headroom. It’s up to you whether you use it or not. If you like the way it looks, go for it.
Rec-709 is a Recommendation (that’s what the “Rec” stands for). If you use pure Rec-709 you should get a 1:1 contrast match between capture and display, but only within the 6 stop display range that a 709 TV can show. If you shoot with a different gamma all that happens is you create a gamma miss-match, so the contrast will change. It won’t produce “illegal” video as such, just a different look, which is no different to what happens when you grade footage. So use whichever gamma curve that gives you the kind of look and range that you want, bearing in mind that the greater the capture range the lower the on-screen contrast.
Hi Alister,
I have a question.
Is the Native ISO of S-logs for the FS5 changed to 2000 with the lasts firmwares?
Cheers!
Yes
Hi Alistair
Does this also apply to the FS5 MKII? So with latest firmware, the Native Base ISO when shooting Slog3 is now also 2000 ISO, not 3200?
Correct, 2000 ISO for S-Log.