Pentax 540FGZ - AF - Hot-shoe clip-on Flash Operating Manual page 91

Auto zoom electronic flash unit
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(ISO 400)
Flash duration (1/2 peak each)
Recycling time/Total number
of flashes
Consecutive Discharge
Flash Coverage Angle
Color temperature
Effective flash range
AF spotbeam
Film speed setting
Focal Length (Zoom position)
(M1/1) (=FULL)
(M1/2)
(M1/4)
(M1/8)
(M1/16)
(M1/32)
(M1/64)
(M1/1) flash: Approx. 1/1200 sec. (TTL) Fastest duration time: Approx. 1/20000 sec.
Battery type
AA Alkaline (LR6)
AA Nickel-Metal Hydride (Ni-MH) (2500mAH) Approx. 6 sec.
AA Lithium (FR6)
TR Power Pack III (C-size alkaline LR14 batteries) Approx. 4.5 sec.
Approx. 2 frames/sec. for 50 times, at M 1/16 output (with using AA alkaline LR-6 batteries)
Auto zoom enabled with autofocus compatible camera and lens combination.
Zoom position
85mm
Vertical Coverage
Horizontal Coverage
(7 step zoom)
Daylight (Suited for daylight color film)
Approx. 0.8 m - 8.0 m (Guide No. 45, ISO 100, f/5.6)
Red beam emitted under low light or low-contrast conditions.
Effective range: Approx. 1 m - 7 m (According to our testing conditions.)
ISO 25 - 1600
85mm 70mm 50mm 35mm 28mm 24mm 20mm*
108
100
76
71
54
50
38
35
27
24.5
19
17
13.5
12
70mm
50mm
23°
26°
34°
31°
36°
46°
90
78
70
64
55
49
45
39
35
32
27.5
24.5
22.5
19.5
17
16
13.5
12
11
9.5
8.5
Recycling time Total number of flashes
Approx. 6 sec.
Approx. 200
Approx. 250
Approx. 6 sec.
Approx. 350
Approx. 700
*Wide-angle panel used.
35mm
28mm
24mm
45°
53°
60°
60°
70°
78°
64
42
45
30
32
21
22.5
14.5
16
10
11
7
7.5
5
20mm*
85°
98°
89

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