Handleiding Panasonic HDC-DX1 (pagina 122 van 128) (Engels)

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VQT1A06

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Outside of the effective range of automatic white

balance adjustment, the image will become

reddish or bluish. Even within the effective range

of automatic white balance adjustment, the

automatic white balance adjustment may not

function properly if there is more than one light

source. For light outside the functional automatic

white balance adjustment range, use the manual

white balance adjustment mode.

White balance

The images recorded by the unit may become

bluish or reddish under the influence of certain

light sources. To avoid such phenomena, adjust

the white balance.

White balance adjustment determines the white

colour under different light sources. By

recognising which is the white colour under

sunlight and which is the white colour under a

fluorescent light, the unit can adjust the balance

among the other colours.

Since the white colour is the reference for all the

colours (that make up light), the unit can record

pictures in a natural hue if it can recognise the

reference colour white.

Auto focus

The lens is moved forward or backward

automatically to bring the subject into focus.

Auto focus has the following characteristics.

≥Adjusts so that the vertical lines of a

subject are seen more clearly.

≥Attempts to bring an object with higher

contrast into focus.

≥Focuses on the screen centre only.

Due to these characteristics, auto focus does not

work correctly in the following situations. Record

pictures in the manual focus mode.

≥Recording distant and close-up objects at

the same time

Since the unit focuses on whatever is at the

centre of the screen, it is difficult to bring the

background into focus when close-up objects are

placed in focus. When recording people with

distant mountains in the background, you cannot

focus on both the subject which is close-up and

the objects which are in the distance.

≥Recording a subject behind dirty or dusty

window

The subject behind the window will not be

focused because the focus is on the dirty

window.

Similarly, when recording something on the

opposite side of a road with heavy traffic, a

vehicle that happens to pass by may be brought

into focus.

≥Recording a subject that is surrounded by

objects with glossy surfaces or by highly

reflective objects

Since whatever is shiny or glistens is brought into

focus, it is hard to focus on the subject to be

recorded. The focus may become blurry when

recording subjects at the seashore, in night

views or in scenes involving fireworks or special

lights.

≥Recording a subject in dark surroundings

The unit cannot focus correctly because the light

information that comes through the lens

decreases considerably.

≥Recording a fast-moving subject

As the focus lens-inside moves mechanically, it

cannot keep up with a fast-moving subject.

When, for example, recording a sports event with

fast moving subjects, the focus may lose its

sharpness.

≥Recording a subject with little contrast

It is easy to bring subjects with a sharp contrast

or vertical lines or stripes into focus. This means

that a subject with little contrast, such as a white

wall, may become blurry because the unit

achieves focus based upon the vertical lines of

an image.

VQT1A06ENG.book 122 ページ２００７年１月２５日　木曜日　午後８時０分

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