Canon ZOOM 8-3 - Manual (Page 20)

3. FOCUSING . . .
When you view through the
eyepiece, you will see a thin
line running across the center
of viewfinder...the image is split
in halves when out of focus.
This is called the Split-Image
Range-Viewfinder. Focusing can
be done as you rotate the
knurled focusing ring on the lens
barrel.
Focus in the following manner:
1. Ajust the diopter of the
viewfinder eyepiece as
illustration on the opposite
page until the center line
is clearly seen.
2. Rotate the zooming ring
and bring it to the maximum
focal length of 42.5mm
(extreme close up).
3. Focus the subject by ro­
tating the focusing ring.
4 When the split-image on
the range-viewfinder appears in perfect alignment,
the lens is critically focused. Once the subject is
focused, it will be maintained throughout the entire
zooming operation or at any desired point you
choose for composition between 8.5 mm and 42.5
mm. If you know the exact distance to the subject,
focusing can also be done by setting the respective
distance scale to the index mark.
1 8