Nikon F/41F instruction manual Setting the ASAjlSO Film Speed

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800 400 200 100 50 2~

SETTING THE ASAjlSO FILM SPEED

The flash output of the ringlight varies according to the setting of the ASA/ ISO ring. To get correct exposure with the ring light flash, you must first adjust the AS A/ ISO ring for the film in use. To do this, loosen the locking screw on the ASAjlSO ring and turn the ring until the number corresponding to the ASAjlSO of your film is opposite the index mark. It is possible to set any film speed from ASA/ISO 25 to 800. Dots between the numbers on the film-speed scale represent intermediate settings such as 32, 40, etc. (see illustration). Once you have lined up the ASA/ISO number, retighten the locking screw to hold the ring in place.

Note : When shooting predominantly light or dark-toned subjects, it may be necessary to make exposure compensation by resetting the ASAjlSO ring to a higher or lower setting.

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