In a camera having a focusing device, the direction of moving a focus lens
included in a photographing lens is varied depending on the defocus state
with reference to a specific position (e.g., reverse point) of the focus
lens. For example, a camera having a defocus-amount detection part for
detecting the defocus amount of the photographing lens, a focus-lens
position detecting part for detecting the position of the focus lens, and
a memory element for storing a specific position of the focus lens,
comprises a focus-lens moving mechanism for moving the focus lens by
inverting the correspondence between the defocus direction output from
the defocus-amount detection part and the focus-lens moving direction
according to the output of the focus-lens position detecting part and the
output of the memory element.