SIGMA DP2 - Manual (Page 49)

48
FOCUSING
Adjustment of autofocus and manual focus operation are
explained below.
HOW TO USE AUTOFOCUS
Position the photographic subject within
the centre of the composition and press
the shutter button “half-way”.
• If autofocus is selected, the focusing point will be illuminated in green. (At
the same time, the auto focus lamp will be illuminated in green.)
• If autofocus cannot set correctly, the focusing point will blink. (At the same
time, the auto focus lamp will blink in red)
When setting AF mode to normal autofocus (without an icon),
the focusing distance is from 28cm to infinity. It is possible
to change AF mode to LIMIT mode (
is displayed) by
pressing the button. In LIMIT mode, the focusing
distance will be from 1m to infinity and the AF speed will be
faster.
Although your camera is equipped with highly precise AF system, in
some cases autofocus cannot set correctly.
• Low-contrast subjects, such as blue sky or a blank wall, etc. or when the
color of the subject is same as background
• The subject is located in a very low light environment
• Overlapping near and far objects, such as an animal behind a fence
• A subject, which moves at high speed
In such cases, please use one of the following focusing methods.
1. Use the Focus Lock function to focus on another subject, which has a
similar focusing distance as your subject.
2. Set the lens to MF mode and focus manually.