Canon 540EZ User Manual
Page 56
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Guide Numbers: (ISO 100 • m)
Coverage angle (mm)
18
24
28
35
50
70
80
105
Normal (full power) tiring (G-No)
16
28
30
36
42
46
50
54
Quick firing
Same as manual firing at 1/2-1/16 output levels
Manual firing
(guide number)
1/1
16
28
30
36
42
46
50
54
1/2
11.3
19 8
21.2
25.5
29 7
32,5
35,4
38 2
1/4
8
14
15
10
21
23
25
27
1/8
57
99
106
127
148
163
177
19 1
1/16
4
7
7 5
9
10 5
11 5
12 5
13 5
1/32
28
49
53
64
7,4
6 1
66
9.5
1/64
2
35
3 8
4 5
5,3
5.8
63
6 8
1/128
1,4
25
27
32
3.7
4 1
44
4.8
* The 18mm coverage angle figures are for when the built-in wide panel is used.
‘ For guide numbers based on feet instead of meters, perform the following calcu
lation: Guide No. (ft) = Guide No. (m)
x
3.3
Battery Life (No. of Bursts) and Recycle Time
Power Supply
Battery life
(No. of Dursts)
(approx)
Recycle time (sec )
Quick firing
(approx.)
Normal firing
(approx )
Built-in
power
supplies
4 AA-size alkaline
120- 800
0.2- 2
0 2-12
4 AA-size Ni-Cd
50- 350
0.2-1 5
0 2-6
External
power
supplies
Transistor Pack E with Ni-Cd Pack TP
350-2000
0.2- 1
0 2-3
Transistor Pack E (4 alkaline C-cells)
400-2500
0.2-1.5
0 2-5
Compact Battery Pack E (LR6/AM-3)
400-2500
0 2-1.5
0 2-5
In the battery life column, figures on the right indicate the number of bursts in A-
TTL mode, and figures on the left indicate the number of bursts in manual (1/1)
mode.
The number of bursts possible at the 1/2, 1/4, 1/8. 1/16, 1/32. 1/64 and 1/128
manual power settings, are greater than number of bursts possible at the full-
power (1/1) setting by factors of 2. 4, 8, 10,12, 15 and 18, respectively.
In the recycle time column, the left-hand values are the flash recycle times in A-
TTL mode, and the right-hand values are the flash recycle times in manual mode
at full (1/1) power.