Sigma SD15 User Manual download pdf (Page 52)

FOCUSING

Adjustment of autofocus and manual focus operation are

explained below.

HOW TO USE AUTOFOCUS

It is possible to use Autofocus function only with AF Lenses. Your camera is

equipped with highly precise AF System and incorporates two different

autofocus modes.(In the case of Mirror lenses and some specialized lenses,

the camera can be use only in Manual Focus mode).

SETTING THE AUTOFOCUS MODE

Set the focus mode switch of the lens, to AF.

Decide the composition through the

viewfinder and press the shutter button

halfway (if the autofocusing is selected, the

camera confirms focusing with an electronic

sound and a red “in-focus” indicator appears

in the viewfinder).

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 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 with a high speed

■ Subjects, which have repeated patterns such as building windows.

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.

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Sigma SD15 User Manual Page 52