Canon FTb Instructions Manual page 23

I
Meter Needle
.7
Meter Index /
cI
5
If the meter needle is pointing above the meter index
and cannot be matched by closing the preset aperture
ring and metering cannot be performed, turn the shutter
speed dial to the faster side . If the meter needle is pointing
below the meter index and cannot be matched by opening
the preset aperture ring , turn the shutter speed dial to the
slower side. When the red signal appears, use high-speed
film or the Canon Booster .
• Full aperture metering is rather recommended with the
FD lenses, because the FD lenses have a full aperture signal
so as to fully compensate the built·in exposure meter.
How to .. Average" Exposures
When measuring a subject with greatly different dark and
bright parts, take two measurements, one each of the dark
and bright parts. Then obtain the average value and set
the f/stop or shutter speed accordingly.
23