What is the Knee?

It helps control the rolloff of highlights as they approach pure white. The lower you set the knee, the more aggressively the camera will pull those whites down, trying to avoid blowout.
 
Knee compresses high intensity signals to prevent blowout, by rolling off that intensity on the brightest parts of your picture back into a range the camera can resolve. The lower the setting the sooner the knee circuit cuts in. However, the picture can start to look strange in the highlights.

As with all things there are trade offs and it certainly isn't idiot proof. Why? Because the world is always building better idiots!
 
cobraclutch2 said:
anything that I could use that does the same on the dvx100?
Click to expand...
There's knee on the 100A and 100B, but not on the original 100.

And no, you can't really simulate the knee, all you could do is control your exposure and your lighting to keep the images from blowing out.

You can think of the knee as almost the opposite of the master pedestal. As the master pedestal allows you to control the dark sections of the picture, raising and lowering the black level, the knee sort of gives you a vaguely similar control over the brightest section.
 
The knee is a little bit like a compressor in audio terms - think of brightness as volume - the knee helps avoid clipping...
 
You asked for it...

The knee is primarily used by young females to keep young males in line. :-Laugh(DBG)-1
 
ive never done tests myself, but does anyone have any stills using the same frame with different knee settings? Just to see if this knee thing is something that one can resolve in post. I use pp2 and there is a level meter with both the whites and blacks, adjusting when grey approaches white and vice versa.
 
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