Pentax ZX-5N - Manual (Page 42)

Flash effective range for Programmed TTL Auto Flash
with ISO 100 (400) film used
flash unit discharges. After using the flash, retract
the built-in flash by pressing it down into the cam­
era body.
If the built in flash is used continuously, the battery
may become warm, but it does not mean the battery
is faulty; it is one of the battery's characteristics.
With the built-in flash poppep-up, an external flash
cannot be attached to the hot shoe. If you would like
to use an external flash together with the built-in
flash, see the flash connections on page 77.
The shutter cannot be released until the flash is fully
charged.
Maximum Lens Aperture Effective Ranoe
f/1.4
approx. 0.8 - 3.9m (0.8- 5.6m)
2.6 - 12.8ft (2.6-18.4ft)
f/2
approx. 0.8 - 3.3m (0.8- 4.8m)
2.6 - 10.8ft (2.6-15.7ft)
f/2.8
approx. 0.7 - 2.8m (0.7- 4.0m)
2.3-9.2ft (2.3-13.1ft)
f/3.5,f/4.7
approx. 0.7 - 2.4m (0.7- 4.0m)
2.3 - 7.9ft (2.3-13.1 ft)
f/5.6
approx. 0.7 - 2.0m (0.7- 4.0m)
2.3-6.6ft (2.3-13.1ft)
The effective range of the flash depends on the maxi­
mum aperture of the lens in use. A lens with a maximum
aperture of f/1.4 is marked as 1:1.4 on its barrel.
• This effective range table is only applicable when the
exposure mode is set at the Programmed AE mode.
When any other exposure mode is used, see page 73.
• The minimum effective range is always 0.7m (2.6 ft)
even if a lens with a maximum aperture f/2.8 or
smaller is in use. When a subject is shot at a distance
closer than 0.7m (2.6 ft), the correct exposure can­
not be obtained, and you will see vignetting in the pic­
ture corners.