Dx code, Exposure compensation – Nikon Camera N90 User Manual

Page 225

Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".

DX code

Film information code printed on film cartridge. The N90, when

set to automatic film speed setting mode, senses the film

speed (ISO 25 to 5000) of DX-coded film when it is loaded.

Exposure Value: A number representing the available

combinations of shutter speeds and apertures that give the
same exposure effect under conditions of similar scene

brightness and ISO.

At ISO

too,

the combination of a one-second shutter speed

and an aperture of f/1.4 is defined as EV1.

The camera may be used only within the EV range of the

exposure meter. For example, with the N90, the exposure

metering range is from EV -1 to EV21 for Matrix metering and

Center-Weighted metering, at ISO 100 with an f/1.4 lens.

Exposure compensation

Exposure compensation for available light is activated by

changing shutter speed and/or lens aperture— by Auto
exposure lock lever, by exposure compensation button or by

exposure bracketing.

In flash photography with a Nikon-dedicated TTL Speedlight,

exposure compensation can also be performed by varying the

amount of flash output.

Camera-originated exposure compensation affects both

foreground subject and background; variations in flash output
amount only affect foreground.

139