Patent ID: 8649109

Claim:
A lens holder comprising: a first barrel including a plurality of helicoidal grooves that extend from a base portion to an end portion at positions with rotational symmetry; a second barrel including a plurality of protrusions that respectively enter the plurality of helicoidal grooves; and a lens frame that is supported on at least one of the first barrel and the second barrel via at least one other barrel and has at least one lens attached thereto, wherein the plurality of helicoidal grooves respectively include helicoidal groove sections in multiple stages that are connected by circumferential grooves on a middle portion that guide the protrusions in the circumferential direction, and the first barrel includes circumferential grooves on the end portion that join to end sides of the helicoidal groove sections closest to the end side out of the helicoidal groove sections in multiple stages and guide the protrusions in the circumferential direction.