Lens apparatus and image-pickup apparatus

2:

• A lens apparatus according to claim 1, wherein the stopper portion and the gear portion respectively come into contact with the first contact surface and the second contact surface in a state where the cam mechanism coupling of the first lens barrel member and the second lens barrel member is not disengaged.

3:

• A lens apparatus according to claim 1, wherein at least part of the stopper portion and at least part of the gear portion are located at a position identical to each other in the optical axis direction.

4:

• A lens apparatus according to claim 3, wherein an end surface of the stopper portion coming into contact with the first contact surface and an end surface of the gear portion coming into contact with the second contact surface are located at a position identical to each other in the optical axis direction.

5:

• A lens apparatus according to claim 1,
• wherein the first lens barrel member includes in the circumferential direction a cam follower portion provided in a region different from the regions where the stopper portion and the gear portion are provided, the cam follower portion engaging with a cam formed in the second lens barrel member, and
• wherein a base portion of the cam follower portion comes into contact with a third contact surface formed in the second lens barrel member to restrict the displacement of the first lens barrel member with respect to the second lens member due to the external force.

6:

• A lens apparatus according to claim 5, wherein at least part of the cam follower portion is located at a position identical to the positions of the stopper portion and the gear portion in the optical axis direction.

7:

• A lens apparatus according to claim 1, wherein a rotation stopper surface is formed on the stopper portion, the rotation stopper surface coming into contact with a contact surface formed on the second lens barrel member in a rotation direction of the first lens barrel member to restrict a rotation range of the first lens barrel member with respect to the second barrel member.

8:

• An image-pickup apparatus comprising:
• a lens apparatus according to claim 1, and
• an image-pickup element that captures an object image formed by the lens apparatus.