Video-Asssist-System

Hide Menu

iris

If the on-screen program mode is on because the settings are changed, the Menu (M) position clears the screen. For example, if color is to be changed with the on-screen program tool, the on-screen program window overlays the image. To see the image and check its color appearance, go to M position. The window disappears but the on-screen program mode is still on. By releasing the switch, the window will come back in the programming mode.

10.3.2 Mechanical Iris

Only a relatively small portion of the light that passes through the film camera’s lens reaches the CCD chip of the video assist, because the light is shared between the view finder, the CCD Chip and the film. Therefore, the IVS lens is designed for normal use with a totally open iris so the maximum amount of light falls on the CCD Chip. Variations in lighting are compensated by the IVS gain control (automatically or manually).

Under certain conditions, such as when lighting is set for low sensitivity film (under 100 ASA), it may be that the IVS gain range is exceeded. In this case the mechanical iris of the IVS lens can be closed.

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