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Canon Booster
An optional Canon Booster is an auxiliary meter that is attached to
the FTb for measuring the subjects under dim lighting conditions.
Light
Measuring Range: With
ASA
100 film, EV 10 (f /22
at
112 sec.)-
EV
-
3.5 (f
/
1.2 at 15 sec
.).
Measuring Method:
Zero· method direct reading type.
Photocell:
Utilizes CdS photocell of the camera.
Exposure Time Dial
:
In the case of FTb: 30, 15, 8, 4.2
,
I
,
1/2
,
1/4
1/8
,
1/15,
1/30
sec.
The camera type indicator window is set at
" P,Fb".
Power Sources:
For operating meter, use two 1.3 v M20
(
~625
)
mercury batteries.
For illumination of meter indicator window
,
use one 1.3 v M20
mercury
battery (use the battery removed from the
camera)
.
Battery Check:
Can be checked by the switch
.
Size:
65 x 54 x 39m
m
(2
y,"
x
2J1i"
x
1)1").
Weight
:
180 grams (6
%
oz.
).
45
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