Pentax Q Operating Manual page 85

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Set the exposure, and press the
d/i button.
The camera locks the exposure at that
instant.
@ is displayed on the monitor while AE
Lock is engaged.
• The exposure remains locked as long as the d/i button is kept pressed or
the shutter release button is kept pressed halfway.
• You will hear a beep when AE Lock is activated. The beep can be turned off.
(p.186)
• When any of the following operations are performed, AE Lock is canceled.
- the d/i button is pressed again
- the Q button, 3 button, or power switch is pressed
- the mode dial is turned
- the lens is changed
• AE Lock is not available when the shutter speed is set to h.
• The exposure is also locked when the focus is locked. If you do not want to
lock the exposure when the focus is locked, set [1. AE-L with AF Locked]
(p.68) of the [A Custom Setting 1] menu to [Off].
• When the shutter speed or aperture value is changed while AE Lock is
engaged in a (Manual) mode, the combination of shutter speed and aperture
value changes while the exposure remains the same. For example, when the
shutter speed is 1/125 sec. and aperture is F4 and these settings are locked,
the aperture automatically changes to F8 if the shutter speed is changed to
1/30 sec.
• When using a zoom lens whose maximum aperture varies depending on the
focal length, the combination of shutter speed and aperture value changes
depending on the zooming position even while AE Lock is engaged.
However, the exposure value does not change and a picture is taken at a
brightness level set when AE Lock is activated.
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