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Most ash units are suitable for use with a CF digital back. However, for safety

reasons, care should be taken when using studio ash units (strobe) and teth-

ered to a stationary computer.

Portable units
Attach the ash sync cable to the lens (or camera body in the c ase of a Hasselblad 200
series model) and make the appropriate settings according to the unit .
is also applies when using studio units when:
a) tethered to a computer not connected to a regular electricity supply system.
or
b) tethered to an Imagebank or laptop computer running on batteries.
With studio type ash units (strobe) and tethered to a computer
If the CWD is tet hered to a computer that is connected to a regular electr icity supply
system as well as a studio ash/strobe unit that is also connec ted to a regular electricity
supply system/generator system, then make the following connections instead:
a) Connect the ash sync input cable from the sync contact (PC connector) on the lens
to the ash sync IN terminal on the back.
b) Connect the ash sync output cable from the ash sync OUT terminal on the back
to a regular ash sync cable that is connected to the un it.
TTL function – 503CW /503CWD only
A TTL function is only available with the 503CW/D. e reective characteristics of the
digital sensor a re dierent to lm surf ace characterist ics for which the TTL fu nction
was original ly designed. However, by changing (in e ect, ‘tricki ng’) the setting, TTL
exposures can be made. Proceed as follows:
Move the ISO selector on the 503CW/D so that is becomes approximately 1⅔ f/stop higher
than the ISO setting on a CF digital back. erefore, for example, when the back is set at
50ISO, the ‘lm speed setting’ on the camera should read 160ISO, and so on. Testing for
the most suitable compensation that suits you is recommended.
See ap propriat e manu als for connec tion d etail s rega rding the va rious units and
adapter s.
Flash / Strobe

A CF digital back can be used together with

most studio or portable units.

When attached to a 503CW (or 503CWD), the

TTL function is also available.

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