Mamiya 645 PRO TL Manual Do Utilizador

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.