Nikon D2Xs manual Exposure Mode, CPU Lenses, Depth-of-Field Preview, B7-Fine-Tune Exposure

Exposure Mode

Exposure mode determines how the camera sets shutter speed and aperture when adjusting exposure. Four modes are available: programmed auto (P), shutter-priority auto (S), aperture-priority auto (A), and manual (M).

CPU Lenses

When using a CPU lens equipped with an aperture ring, lock the aperture ring at the minimum aperture (highest f/-number). At other settings, the shutter release will be disabled and a blinkingwill appear in the aperture displays in the top control panel and viewfinder. Type G lenses are not equipped with an aperture ring.

Depth-of-Field Preview

To preview the effects of aperture, press and hold the depth-of-field preview button. The lens will be stopped down to the aperture value selected by the camera

(modes P and S) or the value chosen by the user (modes A and M), allowing depth of field to be previewed in the viewfinder.

b1—ISO Auto ( 191)

When Custom Setting b1 (ISO auto) is on, the camera automatically varies ISO sensi- tivity between ISO 100 equivalent and a maximum selected by the user to help ensure optimum exposure. In exposure modes P and A, the camera adjusts ISO sensitivity when the shutter speed needed to obtain optimum exposure would be faster than

1/8 ,000 s or slower than a specified value. Otherwise the camera adjusts ISO sensitiv- ity when the limits of the camera exposure metering system are exceeded (mode S) or when optimum exposure can not be achieved at the shutter speed and aperture selected by the user (mode M). When ISO sensitivity is altered from the value selected by the user, ISO-AUTOwill flash in the rear control panel and a flashing ISO-Awill be displayed in the viewfinder. Note that noise is more likely to appear in photographs taken at higher ISO sensitivities.

On can not be selected for ISO auto when ISO sensitivity is set to a value over ISO 800; similarly, values over ISO 800 can not be selected when ISO auto is on.

b7—Fine-Tune Exposure ( 194)

Optimal exposure can be fine-tuned separately for each metering method (note that the exposure compensation icon is not displayed when exposure is fine-tuned).

e4—Modeling Flash ( 202)

This setting controls whether the SB-800, SB-600, and other optional flash units that support the Creative Lighting System (CLS; 108) will emit a modeling flash when the depth-of-field preview button is pressed.

Taking Photographs—Exposure

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