Pentax 540FGZ - AF - Hot-shoe clip-on Flash Operating Manual page 24

Auto zoom electronic flash unit
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● In the manual zoom mode, refer to the LCD panel
and set it so the flash coverage angle matches
the lens focal length or set a flash coverage
angle that is shorter than the lens focal length.
Zoom Positions for Each Format
35mm camera
645 camera
20mm*
24mm
28mm
35mm
50mm
70mm
85mm
● When the wide-angle panel is used, the zoom
button (ZOOM) will not work. (The wide-angle
panel is in a slit on the top of the flash head. Pull
it out so that it covers the front of the flash head.
If the catchlight panel is not necessary, leave it in
the slit.)
22
* With the wide-angle panel
67 camera
35mm*
55mm*
45mm
60mm
55mm
70mm
70mm
90mm
100mm
120mm
135mm
180mm
150mm
190mm
Digital camera
13mm*
16mm
19mm
24mm
34mm
48mm
58mm

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