Patent ID: 8922891

Claim:
Binoculars comprising: a left optical system that includes a left image stabilizing lens; a right optical system that includes a right image stabilizing lens; a lens holder configured to move in a direction orthogonal to an optical axis direction, the lens holder including a left lens holding member configured to hold the left image stabilizing lens, a right lens holding member configured to hold the right image stabilizing lens, and a coupling portion configured to couple the left and right lens holding members to each other; a reference member configured to serve as a positioning reference in an optical axis direction for the lens holder; a left ball unit provided with at least three left balls, wherein each left ball is located around the left image stabilizing lens between the lens holder and the reference member, and configured to roll in accordance with a movement of the lens holder; a right ball unit provided with at least three right balls, wherein each right ball is located around the right image stabilizing lens between the lens holder and the reference member, and configured to roll in accordance with a movement of the lens holder; a left biasing member configured to apply a first biasing force to the left lens holding member to press the left lens holding member against the left balls; and a right biasing member configured to apply a second biasing force to the right lens holding member to press the right lens holding member against the right balls, wherein the coupling portion is flexible to bend and twist so that all of the at least three balls of the ball units, which are located around each of the right and left image stabilizing lenses, contact the lens holder in response to the biasing force of the biasing members.