Leica R9 Instrucciones de operaciones descargar pdf (Pagina 175)

169

As the modes

, and

already create a nor-

mally exposed photograph using the ambient

light, the flash power should be reduced, i.e. a

flash exposure compensation of e.g. –1 EV to –2 EV

should be set. On modern flash units, the aperture

set on the lens is transmitted to the flash unit

and automatically used as a basis for the

computer’s calculation.

Metering takes account of the film speed set on

the camera and any exposure compensation set

for the ambient light and the flash.

Manual flash with fixed output

If the flash unit is used in manual flash mode

with full output or fixed partial output (insofar as

this can be set on the flash unit), there is no con-

trol of the flash light quantity emitted. The expo-

sure modes generally function in the same way

as without flash, but the flash sync speed is used

as the fastest shutter speed. If this limitation to

the flash sync speed results in overexposure, this

is shown in the viewfinder by flashing of the

shutter speed display

225500

(2.9a) in automatic

exposure modes or, in

by the light balance (2.9).

The lens aperture to be set is derived from the

flash output, the film speed and the distance to

the subject or, vice versa, the flash partial output

to be set is derived from the aperture, the film

speed, the focal length and the distance to the

subject (see flash unit instructions). However, it

can also be determined by the camera using a

metering flash (see "Flash metering mode before

exposure -

”, p.178).

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Leica R9 Instrucciones de operaciones Pagina 175