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S-Log will get numerous consideration on the subject of Sony digital camera Image Profiles. There’s an alternative choice that simply is likely to be an excellent choice for many individuals: HLG. Hybrid-Log Gamma is a extra customary HDR format that’s virtually ready-to-go with some units. If you wish to strive it out it is best to perceive the way to greatest deal with it.
Exposing and grading completely different image profiles may be tough, so this useful information from Harv Video/Audio Stuff ought to act as a really good primer for HLG. Understanding the way to get the very best publicity will make life simpler once you begin grading.
This is applicable to a lot of Sony’s cameras as they’ve been utilizing HLG for an excellent lengthy whereas. Specifically, although, you’re going to get greatest outcomes with 10-bit choices just like the a7 IV, a7S III, or FX3. HLG would possibly really be higher than log on the subject of 8-bit recording, so maintain that in thoughts.
HLG, or Hybrid-Log Gamma, is a type of HDR that’s designed for broadcast purposes the place you would possibly must show both a standard SDR picture or an HDR picture utilizing the identical information pipeline. This offers it that Immediate HDR branding the place you possibly can merely report in HLG and playback anyplace at very best quality.
Nonetheless, on the finish of the day it’s simply one other image profile and has its personal quirks for taking pictures and enhancing.
Beginning with the way to expose it, Harv did what he’s used to doing and pushed the picture so far as he may to overexpose it. In his instance, he hit +2 stops overexposed by the in-camera meter. Including some distinction and lowering publicity offered a pleasant picture. He received comparable outcomes at simply 1 cease over.
At “correct” publicity the footage begins wanting duller and duller and after grading there’s the potential for banding. Being underexposed doesn’t work out too effectively both with some odd shade as effectively. Greater than 2 stops overexposed additionally didn’t work out too effectively.
Picture Credit score: Sony
It’s one other balancing act for HLG publicity, although it appears that evidently 1-2 stops over is a candy spot for it. In comparison with S-Log3 in the identical scenario, the log recording appeared to offer a extra pure picture. These outcomes have been repeated in each inside and out of doors footage.
HLG seems to get a extra contrasty and saturated picture. It undoubtedly requires some further work in put up and never all of it’s simply adjusted.
This isn’t so shocking in case you have a look at the HLG curve. The underside of the curve is linear however on the highlights, it has a log curve. This may make grading a bit harder for the reason that completely different areas can react otherwise.
If you’re enhancing HLG you will have to be sure that your NLE is aware of what it’s working with or you’re going to get some weirdness. In Remaining Reduce it’s really very straightforward to do and can provide you an excellent picture with out a lot work so long as you expose correctly.
In comparison with S-Log, HLG would possibly offer you higher outcomes with 8-bit footage because it requires much less stretching in put up. Nevertheless, S-Log seems to be like it’s going to ship a extra pure picture after grading.
Picture Credit score: Sony
HLG is definitely simpler to make use of in case you are going for a Rec.709 last product. S-Log3 additionally delivers far more dynamic vary. Plus, HLG nonetheless has its personal publicity suggestions that don’t make it tremendous easy to make use of and grading requires its personal model.
Different issues to contemplate are how S-Log3 is extra extensively supported with completely different seems to be and LUTs. So, when you’ve got a favourite look you would possibly wish to see if it’ll work with HLG. One other facet of HLG is that it isn’t tremendous grading pleasant, although it ought to get some work. You simply want a really mild contact and ensure the whole lot is ready up correctly earlier than you get began.
Have you ever used HLG earlier than? Are you going to strive it out now?
[source: Harv Video/Audio Stuff]
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