Posts Tagged ‘ S-Log

S-Log and the Sony F3: Application

In the third part of my S-Log series I took the Sony F3 outside on a nice bright day to show what S-Log can do. Jeff Lee and I headed up to the roof of AbelCine and found some shade to stand in, this allowed us to show the most contrast possible. I shot the blog in S-Log as well as in the standard video modes with the AbelRange profile that I created earlier this year. This way I can show just what S-Log enables in the camera. All the clips in the video, except the last one, were recorded to the Gemini 4:4:4 recorder. The Gemini records in uncompressed DPX stacks so nothing was lost along the way. The last shot was S-Log out to a PIX240 recorder in ProRes422 HQ, this was enabled with the new F3 1.31 firmware from Sony. I graded all of the shots in DaVinci Resolve Lite. The difference between S-Log and my range profile can be slight at times, but pay close attention to highlight areas, especially the skin highlights. Thanks to Isaac Kiener from sales for helping out. Stay tuned for the last part of the series on look up tables in the camera.

To learn more about the F3, S-Log, and LUTs make sure to check out our F3 Training Class in NY and LA:

Sony F3 Firmware Update 1.20: 3D + 1 Extra Stop In S-Log

Source:Abel Cine

New Sony firmware update(1.20) for the F3 adds an extra stop in S-Log mode!

Perhaps the most significant addition of all is Exposure Index S-Log mode. You will still need the S-Log option installed to make this work, but if you already have the S-Log option on, this will be enabled right away. The Exposure Index mode works differently than the standard S-Log mode – it sets the camera at an optimal ISO (800) and maximizes the sensor output, giving a full extra stop of exposure. Then when the gain switch is adjusted, instead of adding gain it adjusts the exposure index. A practical explanation of this is that when gain is increased the camera will push up the exposure values, and when it is decreased it will pull down those values. Because the ISO is set to get the most out of the sensor, the exposure index change works more like an adjustment in post. The extra stop in exposure is big news though, and I can’t wait to try it out.

Check out the Abel Cine Blog for more info.

S-log For Dummies Video


S-log For Dummies from Matthew Allard on Vimeo.

Matthew Allard gives a run of how the S-log feature on the Sony F3 works.

Like me you probably hadn’t heard of S-log or even had the faintest idea about what it was or what it does.

S-log was originally only available on super high end cameras like the Sony F35. Now that it’s available for the F3 I thought I’d do some research and try and explain it in as simple language as possible. Now before I do I’m not some super tekkie guy or an engineer so i’m not even going to try and explain why it does what it does. I’m just going to explain what it does. I’m also happy to be corrected on anything I have gotten wrong. I have researched by reading various articles and i’ve tried to not make this article too technical.

In a nutshell, S-log is supposed to offer you exceptional tonal reproduction in both the high-lights and low-lights. In other words it can help expose the brightest part of your scene while still keeping the detail in the shadows. We have all shot something when to expose for the brightest part of a scene we have had to stop the camera down which ultimately means losing all the detail in the shadows. S-log helps you to keep some of that information you would normally lose, while also giving you greater range in the highlights.