Mamiya 645DF, Инструкция по эксплуатации

Страница: 37 / 53

71 72
1.5
22 22 11 11 4 4
1.5 1.2 2
5 4 7
ft
m
P
Av
Tv
M
X
CF
C1
C2
C3
P
Av
Tv
M
X
CF
C1
C2
C3
When the Electronic Dial Lock is “ On ,” all currently set values in “ Av ” (Aperture Priority
AE), “ Tv ” (Shutter Priority AE) and “ M ” (Manual mode) cannot be adjusted with the
front or rear dials. This prevents accidental change of shutter speed or aperture
values.
How to set dial lock
Press the multiple exposure mode and auto
bracketing mode button together for about 1
second so that “
On ,” flashes on the display.
How to release dial lock
To release dial lock, press the same buttons
as in "How to set dial lock" so that “
OF ” flashes
on the display.
When dial lock is set, the dial lock display “ ”
appears on the external LCD.
Front / Rear Dial Lock Function
When the dial lock is ON, the shutter speed and aperture will not change even if
you turn the front or rear dial.
Dial lock can not be set when the exposure mode is “P” (program AE).
Even while dial lock is set, the front dial or rear dial can still be used to perform
the various settings. (Dial lock is temporarily released.)
The setting will be stored after one second.
Depth of Field
Depth of field (D.O.F.) is defined as the zone of sharpness before and behind the
plane of focus. It depends on distance to subject, focal length of lens, aperture setting
and distance the lens is focused at.
In addition to visual observation via the depth of field preview button, the D.O.F. can
be determined by using the depth of field scale on each lens. The f/stop numbers
appear on both the right and left side of the white index mark in the center of the
scale. Simply read the figures which appear above the f/stop numbers on the distance
scale of the lens. (see illustration below)
Depth of Field / Depth of Field Preview
When the aperture is
stopped down
(the subject depth is deep)
When the aperture is open
(the subject depth is shallow)
After focusing, press the preview button.
The diaphragm will be stopped down to the set
aperture.
While operating the preview button, you
cannot release the shutter.
Depth of Field Preview Button
When the preview button is pressed in, the depth of field for the aperture set on the
camera can be checked by looking through the viewfinder.