Re: CineGamma by John Sharaf on Oct 12, 2003 at 6:31:21 pm
You should know that any gamma control in video cameras is designed initially to compensate for the characteristics of the CRT that the picture has traditionally been displayed on. By setting the cross over of the chip chart on the 55 ire line (otherwise known as .45 gamma) the grey scale is most accuarately reproduced on your TV set.
Cine gamma is a convention in several cameras and other "film look" settings that essentially crushes or lowers the crossover setting to make the resulting picture (when displayed on your CRT TV set or monitor) more like film; that is less bright in the middle tones.
In direct answer then to your question then, yes the gamma is pre compression and will affect the picture output of the camera as displayed or recorded!
Re: CineGamma by sacci on Oct 14, 2003 at 3:27:36 am
One thing for sure it is a whole lot faster. The Panasonic cine-gamma looks great when lit well. I'm sure someone that is great with color correction can do a better job themselves I think most people that take time to learn and apply in camera setting will find it is the way to go.
I find that if I shoot with cinegamma, the resulting image preserves more tonal detail for me to play with in post. The only thing to keep in mind is that highlights reach overexposure much more sharply so it is a good idea to underexpose a little or add a rolloff curve in post to make it smoother, but you still end up with a choice nevertheless. I still have to experiment with gradient filters and tiffen ultra contrast to see if I can better manage this.
Another issue that I brought up earlier is some magenta coloring in highlights when using cinegamma, probably because one of the 3 ccd's is reaching full exposure a stop or two before the others, resulting in magenta highlights (which again can be corrected in post anyway). So if you intend to do some quick editing without any color correction, avoid cinegamma, but if you intend to polish your images in post, cinegamma is an excellent tool :)