Nikon PC-Nikkor 28mm f/4 Gebruiksaanwijzing - Pagina 6

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SETTING THE APERTURE

The PC-Nikkor is provided with a manual diaphragm

operable from f/4 to f/22 and a spring-loaded preset

ring to

aid

in setting the diaphragm quickly to the

shooting aperture; a total of eleven

cli.

c k-stop posi-

tions, at 1/2-stop intervals, make for precise place-

ment of the preset ring. Also, identical sets of f/

numbers are engraved on opposite sides of the front

rim of the lens to facilitate operation when the lens

is used inverted.

To set the aperture, the following procedure is recom-

mended

Press the preset ring inward (i.e., toward the

camera body) and turn it until the f/number setting

corresponding to the desired shooting aperture is

aligned with the

ring·

' s alignment index dot; then

release the ring and it will spring outward and lock

place.

Note that the preset ring, once set, limits the

travel of the aperture ring so that the diaphragm can

be set easily and quickly to the

.shooting

aperture

without the need for checking the scale during stop-

down operation.