knee settings
Hi guys,
why should I bother with knee values under FS700 profiles? Overexposed areas can be easily corrected with YUV curves (linear correction) in any NLE program. I am looking for any useful advice. Thanks in advance. Dean |
Re: knee settings
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There are no hard and fast rules. It is up to you and your style of shooting/editing.
I came up with my PPs the same way I set up every new camera. I spent time playing with it while looking at scopes and eval monitor, under many different lighting (contrast) conditions. I shoot for a decent look out of the camera w/o sacrificing DR. These are the settings I use, PP2 and 3 are my standard goto settings, I have 2 copies so I can tweak one in the field if need be and then quickly go back: |
Re: knee settings
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If you are attempting to capture a high contrast scene and retain highlight detail then knee control can be really helpful in squeezing out a few extra stops of latitude. See the "White clip & Knee" video on this page. http://www.dvinfo.net/video/tutorials/prohd I made these tutorials quite a few years ago for the JVC cameras but the concept hasn't changed. Of course, if you are using S-Log2 on a v3.0 FS700 the knee setting is irrelevant because the response curve is predetermined and cannot be adjusted. The same goes for toe (black) and most other PP settings when using S-Log2 (or ITU709 800%). |
Re: knee settings
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Re: knee settings
Sony should have made those setting non-functional when S-Log2 is the selected gamma. You can adjust them all you want but they have absolutely no effect when S-Log2 or REC709 800% are in use. It's the first thing I tested with my scopes when I got the upgrade.
Monitoring properly requires a LOG to REC709 LUT box or monitor that can display a LUT. The Odyssey7Q can also do it. I've also added the functionality to the next version of my OS X app Stereo3D CAT. I might release a version on the app store just for LOG monitoring. |
Re: knee settings
Actually they all do work according to my quick tests. In SLOG2, black gamma definitely has an effect on the image, as do knee, sharpness and color depth. I remember because I spent a while playing with the settings trying to figure if I could correct the SLOG2 images a bit in camera so I could get the benefits of SLOG2 (it doesnt have the colored highlight problem) while also not requiring grading and giving my AVCHD a better starting point so it doesn't have to get pushed too hard to get a corrected image in post, but the black gamma function is too weak to restore contrast fully, and saturation is stuck too low for a corrected image since you can't change it.
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Re: knee settings
Were you testing with scopes or just your eyes? My scopes showed no effect.
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Re: knee settings
My eyes, I could clearly see those functions change the image.
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