What's up my friends welcome back you're watching a half video with a stuff and for you today I'll show you how to master exposing SLog 3 on the A7S3 or other Sony cameras that shoot in 10 bit. Do you still need to overexpose to avoid noise in the shadows or should you under expose to protect your highlights? How about the perfect IRE for skin tones? I try and answer all these things plus I give my very best tips for getting the most out of SLog 3. Now how about I shut up and roll our intro? As ever links to everything mentioned in this video are in the description box below and of course this is not sponsored content so be sure to show some love for the channel and hit that subscribe button and the notification bell that means a lot to me and it means you won't miss a video. So it was always the case with Sony cameras that you had to overexpose SLog 3 just to avoid having noise in the shadows and whilst that may not be true anymore it's definitely not quite that simple. For example let me show you what happens when I slightly overexpose and then slightly under expose this shot here so this is the way that I usually expose these videos. I try and find a balanced exposure so that no highlights are clipping and there's still detail in the shadows and this is what it looks like if I slightly under expose. You'll notice there's slightly less contrast but I do like what it does to the highlight areas and my skin tones through that. Now over to the guy on the other side over there. Thank you so this is what it looks like when we're slightly overexposed. You'll notice a big jump in contrast. I'm not sure I like what it does to my highlight areas up here that much but it looks pretty cool and quite 3D and you certainly won't notice any noise in this mode. Thank you Jens. Why does it have this effect of being more contrasty the brighter your exposure? Well we're dealing with a logarithmic gamma curve where the bulk of the useful information you'll find in the upper slash brighter half of your exposure. This is illustrated really well when we take a look at a waveform. Taking a look at the waveform you can see this is the under exposed, this is the balanced and then this is the over exposed clip. Take a look at the difference in black level between the three clips. It's a pretty big difference and then have a look at the highlight areas. This spike here is actually the upper part of my t-shirt and just look where it spikes on the different clips. Overall the difference in dynamic range between these three clips is pretty huge. The native ISO for s3 on the a7s3 is ISO 640 however Sony have now given us extended lower ISOs all the way down to two stops lower to ISO 160. Now I would normally not recommend using these at all but I did some testing and here's what I found. So here's a really nice and boring test shot shot at the native ISO of 640. It's correctly exposed and I've added a simple look-up table. When I drop the ISO to the extended minimum of ISO 160 and correct for the exposure with my shutter speed it looks like this. You're probably thinking what happened? It looks the same as it did before and that's because it does. Usually what happens in these tests is that you lose masses of dynamic range and it's just not worth shooting in these extended low ISO modes. A little while ago I filmed a video called How to Expose C-Log and I ran a similar test to see what would happen with C-Log using the low extended ISOs and it was terrible. The loss of dynamic range was absolutely crazy and you can see it even better when you look at a waveform. All the highlight areas were clipped at just under 75% really bad. Never do this when you're using C-Log. Back to the Sony example and I can't work out what's happening here. I don't know how Sony has done this, it reacts more like an electronic ND or something. I took a look at the waveform and couldn't see any difference at all. I even went outside and did some real well filming and again no difference. What is happening? Next let's see what's best for skin tones. Now for this test I used just one high color accuracy check it out. This first clip is exposed really brightly with my skin tones all the way up at around 70 IRA. Then I corrected my footage and added a lookup table. It has lots of contrast and to me it seems to accentuate the shadows on my face and I don't think this is the most flattering way to expose. Next our skin tones are our exposed at just under 60 IRA and when we apply the same basic grade you can see this looks to me definitely a little bit more flattering and I think that's because the shadows are a little bit softer looking in this one. Finally in this clip our skin tones are exposed at 50 IRA and after the grade for me this is definitely the most flattering. The shadows are definitely the softest and you can also see more detail in those shadows. So from this test I'd say anywhere from 50 to 60 IRA is a good place to be for your skin tones. Alas, the chatman's brilliant Venice lookup tables can compensate for under or over exposure and they take the gamma curve into consideration so they are incredibly useful. All you need to do is select the version that looks best with the way that your footage is exposed. Everyone who shoots with the A7S3 should have these lookup tables. They are technically free but you can donate a small amount of Alasta if you want to. But what about noise? Well the good news is you don't need to worry about overexposing to avoid noise anymore. It's when you underexpose particularly in lower light situations that's when you're going to be in trouble but that goes for any profile. I still think the best bet for low light shooting is to use one of the linear cine gammas but to be honest S-log 3 does pretty well too as long as you use the higher native ISO of 12,800. Every single one of the clips from my nighttime sequence that I shot for my Sigma 35mm review was shot at ISO 12,800 and the footage came out gloriously clean. It's worth saying that S-log 3 is now fairly forgiving whereas it didn't used to be at all. I've said it before, the reason I like shooting it is because it allows me though a couple of stops in the shadows and highlights to for me to push and pull and correct things if anything goes wrong. Anyway now let's draw some conclusions and I'll try and encapsulate them into some essential S-log 3 tips for you. S-log 3 is a gamma curve. So the brighter your exposure, the more contrast you get. I recommend slightly underexposing in high contrast scenes like daylight to protect highlights and reduce contrast and I recommend slightly overexposing in low contrast scenes like when it's overcast outside. This should increase contrast and give a more balanced look. Skin tones are perfectly good when exposed at 50iRE but definitely use a waveform to check this if you can. Whatever you do, don't use the exposure meter on the back screen. It's fairly inaccurate and doesn't know best. You know best so trust your instincts and your waveform of course. I'm going to do some further testing but from both my real world and control test I can't see any degradation of dynamic range from using the extended low iSays. I don't know how Sony had done this and as much as the results look encouraging, I still can't confidently recommend using them. Watch this space for more on this subject. Anyway that's it for now. You can ask me questions about this in the comments section below if you want to. I'm down there as much as I possibly can be. I just hope you found this interesting and helpful. I've got a large back catalogue of videos about videography on this channel of which YouTube has handpicked this video for you and the one below is my most recent upload. Until next time let's help each other out and shoot better video. See you guys.