Canon EF User Manual

Page 53

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• In fast-breaking situations, or in candid shooting,

you can prefocus the lens by using the distance scale

engraved on top of the lens barrel. Estimate the
distance between you and the subject. Then turn the

focusing ring until this distance (in feet or meters) is

aligned with the focusing index mark. This method is

especially useful when there is not enough time for
through-the-lens focusing, or when you do not want

to draw attention to yourself by lifting the camera

to eye level.

• Film Plane Indicator—the-e-mark engraved on the

camera just to the left of the pentaprism indicates

the exact position of the film plane. This is an aid

when actually measuring the film-to-subject distance

in macrophotography.

Black and White Infrared Photography: Because

infrared light rays focus on a plane slightly behind

that of ordinary light rays, it is necessary to modify

slightly the normal method of focusing the lens.

First, focus on the main subject as usual. Next, take

note of the focused distance (in feet or meters)

which appears opposite the focusing index mark.

Then, turn the focusing ring slightly, so that the

focused distance is aligned with the tiny red dot

engraved on the lens barrel just to the right of the

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