Image capturing apparatus and optical adjustment method

An optical adjustment method for an image capturing apparatus including at least one or more vertically movable lens groups among at least three or more lens groups, which constitute a zoom lens, movable in an optical axis direction, the vertically movable lens group being movable in a direction substantially perpendicular to the optical axis, a zoom lens group among the three or more lens groups, the zoom lens group being movable in the optical axis direction, and a correction mechanism that corrects a position of the optical axis based on the three or more lens groups by moving the vertically movable lens group in a wide-angle end state to a predetermined position in the substantially perpendicular direction, the optical adjustment method comprising the step of:

• moving the vertically movable lens group for the purpose of anti-vibration at each zoom position in the substantially perpendicular direction,
• wherein the following Conditional Expression (1) is satisfied.
• 0.7<(Lw+Bw)/Bt<1.3 (1)
• where
• Lw is an amount of shift for correcting the position of the optical axis,
• Bw is an amount of shift for anti-vibration in the wide-angle end state, and
• Bt is an amount of shift for anti-vibration in a telephoto end state.