Canon F-1 - Coupling Range of Built-In Exposure Meter

Film
Speed
Shutter Speed
ASA 25 1
2
1
4
1
8
1
15
1
30
1
60
1
125
1
250
1
500
1
1000
1
2000
1
ASA 50
2
1
4
1
8
1
15
1
30
1
60
1
125
1
250
1
500
1
1000
1
2000
1
…
ASA 100
4
1
8
1
15
1
30
1
60
1
125
1
250
1
500
1
1000
1
2000
1
… …
ASA 200
8
1
15
1
30
1
60
1
125
1
250
1
500
1
1000
1
2000
1
… … …
ASA 400
15
1
30
1
60
1
125
1
250
1
500
1
1000
1
2000
1
… … … …
ASA 800
30
1
60
1
125
1
250
1
500
1
1000
1
2000
1
… … … … …
ASA
1600
60
1
125
1
250
1
500
1
1000
1
2000
1
… … … … … …
ASA
3200
125
1
250
1
500
1
1000
1
2000
1
… … … … … … …
Minimum
f/stop
f/22 f/22 f/22 f/22 f/22 f/22 f/22 f/22 f/16 f/11 f/8 f/5.6
To reset the camera for full-aperture metering with an
FD lens, push the multi-purpose lever lock to the
white dot. The multi-purpose lever will spring back
automatically to its upright position.
How to "Average" Exposures
When measuring a subject influenced by greatly
different light intensities, take two measurements,
one each of the darkest and lightest parts, and obtain
the average value for the two readings. Then, set the
f/stop or shutter speed at this average value.
Coupling Range of Built
Coupling Range of BuiltCoupling Range of Built
Coupling Range of Built-
--
-in Exposure Meter
in Exposure Meterin Exposure Meter
in Exposure Meter
At given film speeds, the built-in exposure meter
couples within the f/stops and shutter speeds as
indicated in the chart at the left. For example, when
using the Canon FD 50mm f/1.4 lens at ASA
100, the exposure meter couples fully within the
range of EV 3, f/1.4 at 1/4 of a sec. (the first num-
ber as read off the row labelled "ASA 100") to EV
18, f/11 (read off the bottom row) at 1/2000 of a
sec. (again read off the "ASA 100" row, but this
time read the last number). Thusly the first number
of a row indicates the longest shutter speed possible
at a given film speed with the aperture fully open
while the last number denotes the fastest shutter
speed possible with the f/stop used being read from
the bottom row as the number directly under the
fastest shutter speed.
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