Canon 310 XL - Manual (Page 26)

Setting the Distance
The Canon 310XL can focus as close as 1.2 meters,
but distance must be estimated. After determining
the distance between camera and subject, turn the
distance ring until the proper distance is aligned
with the index in order to focus correctly. The
distance ring may be set at or in between the
numbers. The row of white numbers represents
distance in meters and the row of green numbers
represents distance in feet.
Using the Zone Focusing
When filming out-of-doors under a clear sky, the
depth of the field is increased and you can simply
use the 3 or 10 red zone gradations without
focusing exactly. (For generally close shooting of up
to about 7 meters set the distance ring at 3; for
shooting subjects farther away set the distance ring
at 10).
When perfect focusing is required, measure the
distance between subject and camera exactly and
adjust the distance ring accordingly.
14