Phase-one 645 AF User Manual download pdf (Page 40)

A ash sensor located inside the camera body reads the ash

reected off the lm surface at the moment of exposure. The sensor

is connected via the Phase One 645 AF s dedicated hot-shoe to a

shoe- or handlemount style Metz ash unit via the Metz SCA 3952 TTL

Adapter. Maximum ash sync speed is 1/125 sec., making daytime

synchronization possible.

The ISO of the ash is automatically set through the TTL connection

from the camera’s Film Magazine; any adjustment to this is instantly

recognized after the setting is locked and the shutter release is half-

pressed. Also, when Film Magazines with different ISO settings are

switched on the camera body, the TTL ash connection instantly

recognizes the change.

To utilize the TTL ash feature with all TTL-operable Metz ash units,

a Metz SCA 3952 Module is required. Please see the chart below for

compatibility and/or additional adapters that may be necessary.

The resulting ash exposure automation determines correct ash

exposure and automatically adjusts the output of the ash. It also

automatically corrects for exposure compensation normally required

when using lters, close-up bellows or extension tubes. However, as

with all TTL systems, it requires manual compensation for differences

in lm surface reection characteristics. The amount of compensation

is determined by experimentation and is performed on the Mamiya Film

Magazine ISO setting.

1. Mount the SCA3952 adapter onto the Metz ash, insert fully into the

camera’s hot shoe, and then tighten with the locking knob.

2. Set the exposure mode, and then check the shutter speed and

aperture.

Type of ﬂash SCA3952 Module Converter

Metz 44 MZ-2 shoe-mount x

Metz 54 Mz-3 shoe-mount x

Metz 45 CL-3 & 4 Handle-mount x SCA 3045

Metz 60 CT-4 Handle-mount x SCA 3000

Metz 70 Mz-5 &4 Handle-mount x

Adapter

Metz Flash Unit

For more info on Metz, contact the local Metzdealer or www.metz.de

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Phase-one 645 AF User Manual Page 40