Operating Instructions

178

Flash metering mode before exposure -

The LEICA R9’s flash metering function offers

you the option of metering the light energy of

non-TTL controllable flash units (e.g. studio flash

systems and flash units with fixed output) so that

the correct aperture can be selected without the

need for an additional exposure meter. In con-

trast to external flash exposure meters, the

LEICA R9 meters through the lens (TTL), which

brings considerable advantages when using fil-

ters, zoom lenses of varying speeds or for close-

up photography. In order to meter specific details

that are vital to the photograph or, for example, a

grey card, this is done in selective mode, accor-

ding to the markings on the focusing screens.

The exposure mode dial (1.11) is set to the

position and the selective metering field of

the focusing screen is aimed at the appropriate

subject detail. The flash unit is then fired by

completely pressing down the stopping down sli-

der (1.3). After the flash has been fired, the

exposure deviation of the flash, as compared to

correct exposure, appears in the viewfinder (light

balance, 2.8 d) and in the rear panel display

(3.6c) in the range – 2.5 EV to + 2.5 EV in 0.5 EV

steps. Deviations of 3 or more EV cannot be diffe-

rentiated and a new measurement must be taken

using a different aperture setting.

The shortest exposure time that can be set is the

LEICA R9 flash sync speed (1/250s).

Very powerful flash units, especially studio flash

systems, often have flash burst durations that

Pencil of rays for flash metering before exposure