Camera body, interchangeable-lens camera, and method of determining mounting of lens

摘要

A main CPU (a mounting determination part) in a camera body makes a determination by detecting voltage, at a lens detection terminal, n1 consecutive times at time intervals of dl, at the time of turning on a power supply with a power switch. After a result of the determination turns out to be non-mounting, the main CPU makes a determination by detecting voltage, at the lens detection terminal, n2 consecutive times at time intervals of d2 (where n2 and d2 are equal to or greater than to n1 and d1, respectively) on condition that any one of conditional expressions d1

主权项

1. A camera body comprising:
a mounting part to which a lens unit is removably attached, the mounting part comprising a lens detection terminal to which a pull-up resistor is connected, the lens detection terminal being pulled down while the lens unit is mounted; a power supply; a power switch configured to turn on the power supply; and a mounting determination part configured to determine that the lens unit is mounted on the mounting part if a level of voltage at the lens detection terminal on the mounting part has been detected to be low a plurality of consecutive times, wherein the mounting determination part performs a mounting determination by detecting voltage, at the lens detection terminal, n1 consecutive times at time intervals of d1 at a time of turning-on the power supply with the power switch, and wherein, after a result of the mounting determination turns out to be non-mounting, the mounting determination part determines mounting by detecting voltage, at the lens detection terminal, n2 consecutive times at time intervals of d2 (where n2 is equal to or greater than n1, and d2 is equal to or greater than d1) on condition that any one of conditional expressions d1