Canon 312 XL-S - Manual (Page 48)

Macrocinematography
The Canon 312XL-S has a built-in macrocinemato­
graphy system which enables titling or close-up
shooting by simply moving the zooming lever. In
macrocinematography, focus is at 215mm from the
film plane indicator.
1. To set the camera for macrocinematography,
rotate the macro setting lever to the "W" position,
then pull it up and rotate it further to the “M"
position. While performing macrocinematography, a
yellow mark will appear in the upper left of the
viewfinder.
2. Set the distance scale on the focusing ring at
infinity.
3. Measure 215mm from the film plane indicator
to the subject. If you wish to use the wrist strap
for this measurement, first measure the distance
from the film plane indicator to the tip of the strap.
Judge any remaining distance by eye. Since the
depth of field becomes extremely shallow in macro­
cinematography, make sure to determine the dis­
tance from the film plane indicator to the subject
accurately.
4. To cancel macrocinematography, lift up and
turn the macro setting lever clockwise to the "W"
position.