Lens apparatus and image pickup apparatus having the same

A lens apparatus comprising:

• a base member having a first opening corresponding to a first optical system and a second opening corresponding to a second optical system;
• and
• a holding member that holds the base member,
• wherein the base member includes:
• a first positioning portion formed at a position distant from a center of the first opening and a center of the second opening, and
• a second positioning portion formed at a position opposite to the first positioning portion with respect to a midpoint between the center of the first opening and the center of the second opening, and configured to restrict the base member from rotating about an optical axis relative to the holding member, and
• wherein in a case where the lens apparatus is viewed from an optical axis direction, B is a distance [mm] between the center of the first opening and the center of the second opening, (S, T) is coordinates of the center of the first positioning portion in a case where the center of the base member is an origin, r1 is a distance [mm] from the center of the first positioning portion to the center of the first opening and is expressed by the following equation, r2 is a distance [mm] from the center of the first positioning portion to the center of the second opening and is expressed by the following equation,
• r
• ⁢
• 1
• =
• (
• B
• /
• 2
• -
• S
• )
• 2
• +
• T
• 2
• (
• 1
• )
• r
• ⁢
• 2
• =
• (
• B
• /
• 2
• -
• S
• )
• 2
• +
• T
• 2
• (
• 2
• )
• the following inequality is satisfied:
• ❘
• "\[LeftBracketingBar]"
• r
• ⁢
• 2
• -
• r
• ⁢
• 1
• ❘
• "\[RightBracketingBar]"
• ×
• tan
• ⁢
• θ
• <
• 0
• .
• 0
• ⁢
• 5
• where θ is an angle tolerance [°] of the base member relative to the holding member.