Nikon SLRs Series Instrukcja obsługi - Strona 17

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Changing the focusing screen

Seventeen different focusing screens are available for the Nikon F to match exactly any

focal-length lens or picture-taking situation. Any of the seventeen screens may be used

with any of the finders available for the Nikon F.

To change the focusing screen, first remove the viewfinder as described earlier. Then

turn the camera body upside down and press the finder release button a second time. The

screen will drop into your hand. To attach a screen, place it in position with the flat side

facing down and the Nikon F mark pointing toward the front of the camera. Press the

finder release button and the screen will drop into place.

Caution: When changing the focusing screen be careful not to touch the surfaces with the fingers as this will

result in greasy marks. When removing the screen it is advisable to place a clean, dry cloth over the palm of the

hand for the screen to drop onto.

Note: The optical formula of the Type A screen requires the use of an aperture greater

than f/4.5 for focusing with the split-image rangefinder. At smaller aperturesinsufficient

light will reach the eye and one-half

of the rangefinder spot will be

blackened out depending on the

position of the eye. Focusing with

Type A screen should always be done

at maximum aper sure. The problem

of blackout also occurs when the lens

mount is extended considerably for

close-up photography.