Pentax 645 Operating Manual page 33

RECOMMEDED CAMERA HOLDING POSITIONS
It is important that the camera be held correctly to
minimize camera shake, which can result in blurred
pictures. It is suggested that the Pentax 645 be
handled for familiarization prior to actual use.
Basically, two methods of camera holding as
illustrated, are recommended; both involving the
secure holding of the camera against the face using
both hands. The shutter should always be released
gently; a sudden depressing of the shutter may
cause an accidental camera shake situation. Stand
with both feet firmly placed insuring a strong,
steady posture. The left elbow should be drawn in
contact with the body.
Utilizing a tree, wall, table, etc. to support the body
and camera will help in stabilizing grip and balance
during picture taking.
When employing a slower shutter speed or a
telephoto lens, it is highly recommended that a
durable tripod and cable release (available optionally)
be utilized to prevent camera shake and blurred
pictures.
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