Water-resistant structure of a lens barrel

A water-resistant structure of a lens barrel having a plurality of annular members which are concentrically arranged,

• wherein said plurality of annular members comprise:
• a plurality of manually-rotatable annular members which are independently relatively rotatable;
• and
• at least one secondary annular member to which said plurality of manually-rotatable annular members are relatively rotatable,
• wherein said water-resistant structure comprises:
• a first sealing member which seals a gap defined between two of said plurality of manually-rotatable annular members, said gap extending in a radial direction of said plurality of manually-rotatable annular members relative to an axial direction of the lens barrel, one of said plurality of manually-rotatable annular members is fitted on an outer side of the other, said first sealing member being positioned in a vicinity of an open end of the outer of said two manually-rotatable annular members;
• and
• a second sealing member which seals a gap defined between one of said plurality of manually-rotatable annular members and said secondary annular member, said second sealing member being positioned in a vicinity of an open end of the outer of said one of said plurality of manually-rotatable annular members and said secondary annular member,
• wherein a frictional resistance of said second sealing member which is produced between said secondary annular member and said one of said plurality of manually-rotatable annular members is greater than a frictional resistance of said first sealing member that urges one of said two manually-rotatable annular members to follow a rotation of the other of said two manually-rotatable annular members when said other of said two manually-rotatable annular members is rotated.