Nikon AF-S Micro-NIKKOR 60mm f-2.8G ED: 8. Exposure factor 9. Effective f-number variation (P. 146) 10. Setting the aperture

8.

Exposure factor

The f-number of a lens indicates brightness of the image formed

by the lens set at “infinity” shooting distance. The higher the

reproduction ratio is, the more the brightness of the image will

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decrease. The actual brightness of the image is called the “effective

f-number,” and the exposure compensation value for the change

of the effective f-number is called the “exposure factor.”

9.

Effective f-number variation (P. 146)

With this lens, the higher the reproduction ratio is, the more the

brightness of the image on the film (image sensing device) will

decrease and the effective f-number will increase (the amount of

light that comes through the lens´ aperture will decrease). This

variation is automatically compensated for by the camera´s

exposure meter, so the user can determine exposure or operate TTL

flash shooting without having to consider the exposure factor.

The f-number displayed in the camera´s LCD panel or viewfinder is

the value automatically compensated.

10.

Setting the aperture

Set the aperture on the camera body. When exposure (or shooting)

mode is set at “A” (Aperture Priority auto) or “M” (manual), the

camera will control to maintain the predetermined f-number (up to

approx. 1.6 stops) as the effective f-number varies with shooting

distance.

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