350 THE HASSELBLAD MANUAL
HASSELBLAD FLASH UNITS
The Hasselblad D-Flash 40
The Hasselblad D-Flash 40 fl ash unit (see Figure 18-13) is compact and lightweight and has a
guide number of 137 (40 in meters) in the N refl ector position and 110 (33 in meters) in the
W position. The unit is designed for the dedicated fl ash system in V camera models only. The
fl ash refl ector can be moved either to N for lenses 80 mm and longer or to W for use with
shorter focal length lenses. The refl ector can also be removed for bare bulb use.
The power for the fl ash can come from fi ve AA batteries, fi ve rechargeable AA NiCads, or
an external accessory power pack. The number of exposures per charge is 120 to 1200 from
regular AA batteries, 45 to 450 from rechargeable AA types, or 270 to 2250 from the external
power pack. The actual number of fl ashes always depends on the distance between fl ash and
subject.
Other Flash Units
The Hasselblad Pro Flash, the forerunner to the D-40, can be used on Hasselblad and other
cameras in the manual or automatic fashion. Shadowless lighting is obtained when light of
equal intensity reaches the subject from all directions. Such lighting is produced by a ring-
light. The Hasselblad macro fl ash consists of two small fl ash units mounted on a bracket
around the lens for practically shadowless lighting in close-up photography.
Figure 18-12 Checking fl ash sync. (1) To check fl ash synchronization, look through the back of
the camera while releasing the camera with the fl ash attached. You should see the fl ash fi ring.
For a complete check, test at all shutter speeds. (2) The PC contacts on the latest V system
lenses include a locking device.
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