These scenes are typically those shot in lighting such as in snow or at beach scenes or where there is a
large ratio between foreground subject and background.
To correct for these errors in metering this control allows for + 3 or – 3, f-stops of exposure compensation
in 1/3 f-stop increments.
Push in the top control wheel to access the control and then use the top control wheel, left or right
navigation buttons on the 4-way navigation buttons or using the touch control to drag the slide bar to
change the applied value.
The final control, the background defocus, allows you to change the aperture which the camera has
automatically selected.
This automatic value will have been determined by the camera evaluating the image data from the sensor
for scene type and both scene brightness and any subject movement occurring in the image.
It will select the most appropriate aperture, a small one (usually F8) for landscapes and a large one for
portraits (usually F2.8), however, you can over-ride this and select the aperture that you want to use in
your image.
By changing the aperture, you are adjusting the depth of field (DOF) achieved in the image. Large apertures
result in very small depths of field whilst smaller apertures give larger depths of field.
Armed with this knowledge you can achieve the desired look for the background focus by changing the
background blur.
Thus, a subject can be made to stand out in isolation from the background, such as in a flower study or
portrait, or you can apply more depth of field when shooting smaller wildlife to ensure as much of the
subject is in focus as possible.
the background defocus control
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