Canon 540EZ User Manual download pdf (Page 56)

Guide Numbers: (ISO 100 • m)

Coverage angle (mm) 18 24

28 35 50 70

80 105

Normal (full power) tiring (G-No)

28 30 36

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

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

25 27

1/8 57 99 106 127 148 163 177 19 1

1/16

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

27 32 3.7 4 1

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.

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Canon 540EZ User Manual Page 56

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