Anti-vibration optical device

An anti-vibration telescope, comprising:

• a housing;
• a first optical element provided on one side of the housing;
• a second optical element provided on another side of the housing;
• an image blur corrector housed into the housing to be located between the first optical element and the second optical element, the image blur corrector including an erecting prism, a supporting mechanism rotatably supporting the erecting prism and an actuator for rotating the erecting prism via the supporting mechanism;
• a first detector configured to detect a first angular velocity, the first angular velocity being an angular velocity of the housing;
• a second detector configured to detect a second angular velocity, the second angular velocity being an angular velocity of the erecting prism;
• and
• a controller configured to control the actuator based on the first angular velocity detected by the first detector and the second angular velocity detected by the second detector and configured to control the actuator such that the second angular velocity is a product of the first angular velocity and a proportionality coefficient set in advance.