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Using Built -in Exposure Meter
Canon FTb provides the most accurate light measurement
possible with its unique TTL (Through·The·Lens) system
.
The
built·in
exposure meter, which is of match needle type,
is coupled to the ASA film speed scale, shutter speed dial
and preset aperture ring.
The CdS photocell of the exposure meter is placed in the
closest position to the beam·splitting condenser lens.
The
central area metering system enables accurate measure·
ment of the main subject even in
counterlight.
The rectangular frame in the viewfinder represents the
light measurement area of the CdS photocell.
Place the
main subject within this frame and measure the intensity
of light so as to obtain the proper
exposure.
• The correction of the full aperture opening of the lens is
performed automatically.
Therefore, the operation does
not change regardless of the speed of the lens used
.
An
FL lens can be used only with stopped·down metering.
• Due to the characteristics of the CdS photocell, the
movement of the meter needle may occasionally become
slack, owing to changes in the degree of light.
• Metering at
"B"
on the shutter speed dial is not possible
with the built·in exposure meter, because" B
"
is
used for
long exposures over one second
.
• Always use a lens hood when shooting against the
light.
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