To ensure that the viewfinder image and
focusing screen elements are adjusted for
your vision, you can adjust the diopter set-
ting from –3 to +1 dpt. Simply turn the
diopter switch — located to the right of the
viewfinder eyecup — up or down until the
image in the viewfinder is sharp. If you wear
eyeglasses during shooting, be sure to wear
them as you set the dioptric adjustment. To
set the dioptric adjustment, focus the lens
by pressing the Shutter button halfway, and
then turn the knob until the image in the
viewfinder is sharp.
Lens controls
All Canon lenses provide both automatic
and manual focusing functionality via the
AF/MF (Autofocus/Manual Focus) switch on
the side of the lens. If you choose MF, the
XSi/450D provides focus assist, shown in
the viewfinder, to confirm sharp focus.
When sharp focus is achieved, the Focus
confirmation light in the viewfinder burns
steadily and the camera emits a focus con-
firmation beep if the beep is turned on.
Depending on the lens, additional controls
may include the following:
12
Part I
✦
Using the Rebel XSi/450D
Focusing ring
Zoom setting
Zoom ring
Distance scale
Filter mounting thread
Focus mode switch
Image stabilizer switch
1.6
Lens controls
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