User Instructions

11.4 Auto Sensor Limit
Setting Qflash to Auto exposure makes picture taking fast and easy. However, an automatic
flash has a flaw: the sensor on the flash expects the subject to be wide, flat, and fill the view of
the sensor. A person standing against a wall fits this description; people in a catering hall or in
a park at night do not. When the background is located far behind the subject, the automatic
flash struggles to produce even lighting. The result is often an over exposed subject,
sometimes by as much as two stops. When a photo lab develops film with a greatly over
exposed subject, it will ‘print down’ to bring the flesh tones back into range. Or, time will be
spent adjusting a digital image, with the resultant loss of detail and image quality.
To solve this problem use the Flash sensor limit.
∞ - No limit placed on sensor distance
20ft / 6m, 15ft / 4m, 10ft / 3m, 5ft / 2m,
When the Flash Sensor Limit is set to ∞ the flash will produce the desired f/# for a subject
within the flash’s minimum and maximum flash distance.
With Auto Sensor Limit turned on, a ‘Limit’ indicator is activated. After a flash, if the subject’s
distance exceeds the sensor limit currently set (5, 10, 15 or 20ft. / 2, 3, 4, 6m) the word ‘Limit’
will appear in the display. Three beeps and/or 3 blink warning may also occur (if those features
are set in Options). If the subject is within the current sensor limit normal exposure indicators
(OK, Undr, Over) will apply.
11.6 Using the Sensor Limit
The flash Sensor Limit function essentially cuts down on the distance that Qflash
attempts to illuminate. See the examples shown below.
Open field
The subject is located 15 feet from the
camera. The background is an open field
in a park. By setting the Sensor Limit to
15 feet, the flash will read only the light
from subjects within 15 feet, ignoring anything
further.
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