Sigma SD15 User Manual download pdf (Page 56)

FOCUS LOCK

This photography method is useful if a photographic subject is not positioned

within the central AF frame.

Choose the AF point according to the "AF POINT SELECTION” instructions on

page 53.

Position the photographic subject into the selected AF frame, and focus by

pressing the shutter button half-way.

Keep the shutter button depressed half-way while you compose the picture as

desired. Then press the shutter button the rest of the way to take picture.

■ Focus Lock can be used with (single AF mode) only. The AF cannot be

locked in

(continuous AF mode).

MANUAL FOCUS

In situations, where autofocus or focus lock is not effective, you can focus

manually.

Set the focus mode switch, on the lens to the

M position.

While looking through the viewfinder, turn the

focusing ring on the lens until you get a clear

sharp image.

■ When you use a lens, which has maximum aperture of F5.6 or faster, the

focus indicator in the viewfinder will appear, when correct focus is attained.

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Sigma SD15 User Manual Page 56