Nikon PhotomicF Tn Finder Manual de instrucciones - Página 22

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Repro-Copying

For originals such as photographs which have tonal gradations, exposure is determined in the usual way.

In the case of originals having strong contrast and no gradation, such as documents or line drawings, measure the

brightness of the white portion of the original (if the original is predominantly black, a sheet of white paper may be

substituted) after decreasing the film speed by four marks. Or open up the lens about 1-1/3 stops.

For originals with continuous tonal gradationS, determine exposure in the usual way by the stop-down method. To

copy slides with letters or figures on a transparent background, decrease the film speed four marks, or open up the

lens about 1-1/3 stops. In the case of transparent figures or letters on a dark background, either increase the film

speed five marks or stop down the lens about 1-2/3 stops.

Important:

The above are only approximate guidelines. Exact exposure determination is extremely difficult, espe-

cially with reversal color films. Therefore, it is advisable to make several dffferent exposures for each subject to be

sure of getting one that is correct.

Fisheye-Nikkor Auto 8mm f/2.8

Because of its wide picture angle (180°), the Fisheye-Nikkor is susceptible to inflated exposure readings due to

direct sunlight. To compensate, open up the lens two stops.