Flash photography – Mamiya 645 PRO TL User Manual

Page 32

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Flash Photography

In addition to its standard flash sync system, the Mamiya

645 PRO TL features TTL (through the lens), off the film

electronic flash exposure automation. A flash

sensor located inside the camera body reads the flash

reflected from the film surface at the moment of exposure.

The

is connected via coilcords to a dedicated

electronic

SCA 396 thyristor module, which is

attached to the flash shoe of the camera. The module has

an

dial on which the speed of the film in use is set. The

resulting flash exposure automation determines correct

flash exposure and automatically adjusts the output of the
flash. It also automatically corrects for exposure

compensation ordinarily required when using filters, close-

up bellows extension tubes. However, as all TTL

systems, it requires manual compensation

for differences

in film surface reflection characteristics. Compensation is
made by adjusting the film speed selector

setting

an SCA

396 module. The amount of compensation is determined

by experimentation.

Important:

Read Operating Instructions which are supplied with

flash unit before use.
Always turn off camera’s

power

switch when attaching

or removing flash units.

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