Nikon F25B manual Exposure Compensation Adjustments

EXPOSURE COMPENSATION ADJUSTMENTS

Adjustments for Focusing Screens

Light transmission properties vary somewhat with focus- ing screen type, thus occasionally requiring exposure correction to compensate for the combined effects of the lens/screen combination in use. The numbers listed in various blocks of the table on the opposite page de- note the amount of correction necessary in f/stops. To adjust the camera's finder for the indicated f/stop cor- rection, lift and turn the ASA film-speed index ring until the ASA value for the film in use is aligned with the appropriate mark engraved on the ring. In the ex- ample figure shown, ASA 100 is aligned with the -Y:!mark to provide the correction required when using the Type C screen with the Nikon F2SB Photomic camera and the Fisheye-Nikkor 8mm f/2.8 lens, as indicated in the table. (When "0" is indicated in the table, no com- pensation is required.)

Exposure measurement via fu II-aperture method .

• = Exposure measurement via stop-down method .

• = Exposure measurement not possible; lens/screen combination permits only focusing operation.

Blank space indicates lens/screen combination cannot be used.

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