Choosing Aperture; (A: Aperture-Priority Ae) - Olympus OM System OM-1 Instruction Manual

Choosing aperture

In this mode, you choose the aperture (f/-number) and the camera automatically sets
the shutter speed for optimal exposure according to subject brightness. Lower aperture
values (larger apertures) reduce the depth of the area that appears to be in focus
(depth of field), blurring the background. Higher aperture values (smaller apertures)
increase the depth of the area that appears to be in focus in front of and behind the
subject.
Lower aperture values...
F2.8
...reduce depth of field and increase
blur.
Rotate the mode dial to A.
1
2
Choose an aperture.
• Use the front and rear dials to adjust the following
settings.
Front dial: Exposure compensation (P. 106)
Rear dial: Aperture
• The shutter speed selected automatically by the camera
will appear in the display.
• Exposure compensation can also be adjusted using the
F button. Press the F button and then rotate the front
or rear dial.
3
Take pictures.
%You can choose the functions performed by the front and rear dials. g "Assigning Roles
to the Front and Rear Dials (KDial Function / nDial Function)" (P. 216)
%You can use the Fn lever to reverse the roles of the front and rear dials. The lever
can also be assigned other roles. g "Customizing the Fn Lever (Fn Lever Settings)"
(P. 219)
%You can choose whether the display reflects the effects of exposure compensation or
maintains a constant brightness for ease of viewing. g "Changing the look of the
display (KLV Mode)" (P. 225)
%You can stop aperture down to the selected value and preview depth of field.
g "Changing the roles of buttons (Button Settings)" (P. 208)
F4.0 F5.6

(A: Aperture-Priority AE)

P A S M B
Higher aperture values...
F8.0 F11
...increase depth of field.
1023 1023 [ 1 : 02 : 03 ] [ 1 : 02 : 03 ]
r r 1 1
O O
100 % 100 %
A A
250 250 5.6 5.6 -
1/ 1/ F F
Aperture value
n
2
F F 60p 60p L - 8 L - 8
L 4K
1 1
S - AF S - AF
3 3
+ 0.0 0.0 200 200
0 0 ISO ISO
Auto Auto
45
EN