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Synchronizing Flash Unit
Canon FTb
is
designed
so that two systems
of flash
photo·
graphy can be
connected
to it-the match needle type auto·
matic flash photography which is called the Canon Auto·
Tuning (CAT) System, using the Speedlite 133D (exclusive
type'), and ordinary synchronizing flash
photography.
Synchronized
.
Type
Shutter
Speed
FP
class (#6,
Press
26)
1/
125 or faster
1/30 or slower
Flash
M class
(
M3, #5, Press
25)
1/3
0 or slower
MF I
(
AG.1, AG·3,
)
c
ass M2, Flashcube
1/30 or slower
Electronic
Speedlite
133 D
1/60 or slower
Flash Unit
1
The CAT System is connected
exclusively
to the FD
50mm F 1.4S.S.C.,
FD 50mm
F
1.8S.C..
FD 35mm
F
2
S.S.C
.
and
FD 35mm F 3 .5 S.C. lenses which have the
flash adapter coupling pin. Attach the Flash Coupler A20r 8
2
to the lens which transmits the focusing distance to the
meter circuit of the camera. In the case of the CAT System,
the charging power level of the Speed lite
is
continuously
transmitted to the meter circuit of the camera
.
Thus,
the correct exposure can be decided as follows
:
First set
33
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