White Balance - Sony EVI-370 series Instruction Manual

EVI-370 series
OUTLINE OF FUNCTIONS
Focus
An inner focus system is employed for the EVI-370/371 series. The auto-focus control is based on high frequency
components with high video signal level, that is components with high luminance and strong contrast in the measurement
area.
The focusing distance increases towards the tele end. At the wide end a minimum focus distance of 1 cm can be achieved
whilst at the tele end this increases to 80 cm.
Auto focus is set in the initial state.
NOTE : In the auto-focus mode, focusing will constantly be performed even with a still image. To
preserve the durability of the unit it is recommended to avoid 24-hour continuous use of the
auto-focus mode.

White Balance

Auto white balance (ATW)
For this unit's ATW, the TTL method is adopted to reproduce the natural colors of the subject as closely as possible by
calculating the color data of the whole screen. To prevent the subject from being all white by operating white balance function
blindly, the operation range of auto white balance function is limited. This function also judges whether indoor or outdoor
from the brightness and changes the withdraw range of auto white balance accordingly.
Preset white balance
The preset white balance can be selected from fixed indoors (3200K) and fixed outdoors (5800K).
One push white balance
The one push white balance is a function which, once the subject is set to certain lighting conditions, will expose the subject
under these conditions by gaining white forcibly. The color is reproduced naturally without being affected by the surrounding
conditions of the subject. When set, the one-push white balance trigger is sent assuming that the white subject occupies more
than 1/2 of the screen. The one-push white balance data is provided when the lithium backup SW is ON even though the power
is off (2 days for fully-charged battery). When the lithium backup SW is off, the data will be lost when the power is turned off.
Therefore, when turning off the power, set the one-push white balance again.
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