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

Patent metadata

Field	Value
Publication number	US-8979403-B2
Application number	US-201414335184-A
Country	US
Kind code	B2
Filing date	Jul 18, 2014
Priority date	Jan 19, 2012
Publication date	Mar 17, 2015
Grant date	Mar 17, 2015

Abstract

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<d2 and n1<n2 is met.

First claim

What is claimed is:

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 v…

Assignees

• Fujifilm Corp

Inventors

• IMAMURA Kenshi

Classifications

• H04N23/634

  Electricity · mapped topic

• H04N23/667

  Electricity · mapped topic

• H04N23/663

  Electricity · mapped topic

• H04N23/673

  Electricity · mapped topic

• H04N23/65

  Electricity · mapped topic