Pentax 540FGZ - AF - Hot-shoe clip-on Flash Operating Manual page 85

Camera format
Flash
ISO light
intensity
1/1
1/2
1/4
ISO200
1/8
1/16
1/32
1/64
1/1
1/2
1/4
ISO400
1/8
1/16
1/32
1/64
35mm 85mm
645 150mm 135mm 100mm
67 190mm 180mm 120mm
DIGITAL 58mm
76
54
38
27
19
13.5
9.5
108
76
54
38
27
19
13.5
Zoom position
70mm 50mm 35mm
70mm
90mm
48mm 34mm 24mm
71 64
50 45
35 32 27.5
24.5 22.5 19.5
17 16 13.5
12 11
8.5 8
100 90
71 64
50 45
35 32 27.5
24.5 22.5 19.5
17 16 13.5
12 11
*With the wide-angle panel attached
28mm 24mm
55mm 45mm
70mm 60mm
19mm 16mm
55 49 45
39 35 32
24.5 22.5
17 16
12 11
9.5 8.5 7.5
6.5 6 5
78 70 64
55 49 45
39 35 32
24.5 22.5
17 16
12 11
9.5 8.5 7.5
*20mm
*35mm
*55mm
*13mm
30
21
14.5
10
7
5
3.5
42
30
21
14.5
10
7
5
83