Sony Ericsson DVW-707P manual Contrast Range

Contrast Range

The new DVW-790WSP, DVW-709WSP and DVW-707P can handle a very impressive contrast range. A number of useful features are readily available to help production crews meet specific shooting requirements.

Gamma

The gamma curve, in general, determines the way in which mid-tones are handled and therefore is of vital importance in achieving the overall ÔlookÕ of a shot. Changing master gamma is achieved either from a remote control unit or via the setup menu. These new camcorders are provided with a more natural and smoother gamma curve with 48 gamma points (the previous generation of DVW-700P and DVW-700WSP models had 32 gamma points) and therefore a more natural overall tonal reproduction.

In addition to master gamma and gamma balance, several independent gamma curves are provided to increase operational flexibility. They can all be accessed via the setup menu. Curve A is the standard setting. Curve B gives a higher initial gamma gain, stretching black areas of the picture. Gamma C further increases the initial gamma. Gamma F is the so-called ÔFilm GammaÕ and represents the average transfer characteristics of a few of the most popular film stocks. It has a shallow slope in the shadows area, slopes uniformly in the mid-tone region and flattens off in the high-lights, enhancing the overall dynamic range.

All the above gamma curves are built-in and cannot be altered. However, the Gamma S position is reserved for a gamma curve that can be read from the Digital Gamma Setup Cards (BSC-1 Pack) or from a PC running Sony BZP-100 setup software. This software allows this gamma curve to be modified.

Gamma A

Normal

Gamma F

Black Gamma

The Black Gamma function helps to control shadows area with precision. It can help to bring out details from the dark parts of the picture without affecting mid-tones and keeping absolute black level unchanged. The range of creative possibilities offered by the flexibility of setting up Gamma and Black Gamma is quite inspiring and, when mastered, offers users a great advantage in achieving a desired ÔlookÕ.

18