Pentax 6x7 - Focusing Mechanisms and Infinity Setting

subjects which would be extremely difficult to
locate otherwise.
Focusing: Focusing with the long telephoto
lenses (except the 500mm lens) is accom-
plished via
two focusing knobs located oppo -
site each
other at the base of the rear of the
lens. For accurate focusing, turn both knobs
slowly with both hands. When the subject
is
moving , loosen the panning lever of the
tripod and fo ll ow the subject by moving
the camera with your right hand, while you
focus
by turning the left focusing knob with
your left hand. Be sure to retighten the tripod
panning lever after shooting in the above
manner:
otherwise , the lens may fall forward ,
knocking over the tripod .
NOTE:
With certain long telephotos , the focusing
ring will not stop at the infinity setting , but
may go sl i ghtly beyond . This is a design fea-
ture which has been provided to compensate
in shooting conditions such as extreme heat
which prevent the lens from focusing pre -
cisely
at infinity .