Mamiya 645DF, Руководство пользователя

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7.1.18 AFL
Set the function of the AF Lock button with one of the following options:
While Pressed: Press the AFL to lock focus once.
AF operation: This activates AF every time the AFL button is pressed. (It
performs the same operation as half-pressing shutter button).
Continuous: Locks AF until the AFL button is pressed again.
7.1.19 M-Mode AEL
Assign the AEL button to automatically set an aperture or shutter value
when using M (Manual mode). Ensure that the AEL button is pressed for
at least 2 seconds to get an aperture or shutter value. Select one of the
following options:
Shutter Speed : A recommended shutter speed is set when the AEL
button is pressed. The aperture setting remains unchanged.
Aperture : A recommended f-number is set when the AEL button is
pressed. The shutter speed setting remains unchanged.
No operation : This option disables the AEL button in Manual (M) mode.
7.1.20 AF Assist Light
The AF Assist Light automatically functions to help the performance of
Auto Focus (AF) when shooting in low ambient lighting conditions. The
AF Assist Light can be switched off from this menu. (The AF Assist Light
is likely to be switched off when a flash with its own AF Assist lamp is
used with the 645DF+ camera).