Hasselblad 500C/M Instruction Manual page 39

C LENSES
C lenses (this designation does not appear on
the lenses) can be used with the 500C,
500C/M, 500EL, 500EL/M, 2000FC, and
2000FC/M (see also the Instruction Manual
for the 2000FC/M).
They all feature a built-in Synchro-Compur
leaf shutter, an automatic diaphragm, an ex-
posure value scale, automatic depth-of-field
indicators, M and X flash synchronization at
all speeds, and a self-timer V. The C lenses
attach to the camera via a bayonet mount.
Diaphragm (Fig. 62)
The aperture ring (13) and shutter speed ring
(14) are cross-coupled. Both rings are oper-
ated with the grip ring (15). For independent
setting of the aperture or shutter speed, press
the cross-coupling release (4) to the rear and
rotate the ring until the desired value is oppo-
site the central index (12). The lens is normal-
ly focused wide open. The diaphragm auto-
matically closes down to the working f/stop
at the moment of exposure. Press the depth-
of-field preview catch (5) to check out the
available depth of field. This will stop the
lens down to the working aperture. The dia-
phragm is reopened to the maximum aperture
by turning the aperture ring (13) to the maxi-
mum aperture or tripping the shutter (with a
detached film magazine) and winding the
camera.
Shutter speeds (Figs 63—64)
The shutter speed ring (14) has three different
scales with white (black on chrome finish
lenses), green, and red numerals. Only the
white (black) numerals and B can be set oppo-
site the central index (12).
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