Nikon N5005 Flash synchronization, Number, ISO film speed, Matrix Metering system

Aperture-priority auto: User selects aperture and camera chooses shutter speed for correct exposure.

Manual: User select both shutter speed and aperture with the meter'srecommendations for correct exposure.

Fill-flash

A method of flash photography that combines flash illumination and ambient light.

Subjects lit from behind or near a window normally appear too dark in photographs, so it is recommended you use a flash for fill-in lighting.

(See "Balanced fill-flash.")

Flash synchronization

The timing of the flash so it fires coincident with the operation of the camera'sshutter.

f-number

Number that indicates brightness of film plane image. Increasing/decreasing f-number is equivalent to opening/stop- ping down lens aperture. The f-number series is 1.4, 2, 2.S, 4, 5.6, S, 11, 16, 22, 32, etc. Changing one step to the next larger number (Le., from 1111 to 1116) decreases image brightness by 1/2; moving to nearest lower number doubles the brightness.

Guide number

The number given to a flash bulb or electronic flash unit to indicate its power. A guide number may be quoted in meters or feet, and depends on the speed of the film being used. Guide numbers quoted assuming a relatively efficient reflector surrounds the flash source, e.g., an average-sized room.

ISO film speed

The international standard for representing fi lm sensitivity (speed with which it reacts to light). The higher the number, the greater the sensitivity, and vice versa. A film speed of ISO 200 is twice as fast as ISO 100, and half the speed of ISO 400 film.

LED

Light-Emitting Diode. For the N5005, used to provide indica- tions inside the viewfinder and self-timer indication.

Matrix Metering system

An advanced camera light metering system using a multi- segment sensor and computer; available Nikon SLR models F-401x1N5005, F-601/N6006, F-601 M/N6000, F4, F-S01s/NSOOSs and F-S01/NSOOS. A basic version is used with the Nikon F-401/N4004 and F-401s/N4004s models. Matrix Metering is an exclusive Nikon feature.

SLR

Single Lens Reflex. A type of camera in which you look through the camera'slens as you view through the camera finder. Other camera functions, such as light metering and flash control, also operate through the camera's lens.

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