22
Exposure system
A very ingenious system in the exposure
meter
, which accurately measures the light,
that
enters
the
camera through
the
lens, has been incorporated in
the
Miranda Sensomat.
The sensing area
of
the
exposure meter is invisibly placed behind the mirror in alignment
with
the
optical axis, always in position for exposure reading, except for the split-second mirror
action when taking a picture. The exposure
meter
system is cross-coupled and responds
to
either shutter speed
or
lens diaphragm adjustments. Either shutter speed or lens diaphragm may
be preselected with
the
second adjustment used
to
set the exposure
meter
.
An important fact
is
the positioning
of
the CdS cell directly behind the lens, as this
obviously gives
the
most
accurate
"direct"
light value and is less sensitive
to
extraneous light
falling in through the eyepiece (contrary
to
cameras with CdS cells placed inside the finder).
The exposure meter
of
the Miranda Sensomat has been so designed
as
to cover the widest
possible range
of
exposures, from
EV
1.6
to
EV 18 (with 100 ASA film and 50mm. f1.8 lens,)
filmspeeds from ASA 25
to
ASA 1600. Correct exposure
is
easily obtained and visible in the
viewfinder, an added feature for last minute adjustments.
The Miranda Sensomat through
the
lens exposure system
is
of
the closed-down aperture and
partial average type, very convenient for a wide range
of
applications, and especially convenient
in macro-micro and close-up photography, and when using lenses and accessories
of
an unknown
f-stop number.
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