Patent ID: 9235026
Filing Date: 2016-01-12
CPC Classification: G02B,G03B,H04N

Claim Text:
1. An optical instrument, comprising: a ring member which is arranged to be rotatable with respect to a lens barrel, and also to slide in an optical axis direction; a movement mechanism for slide movement of the ring member to a first position or a second position in the optical axis direction; a display for carrying out display in order to set a mode of the optical instrument and numerical values for that mode; at least one controller CPU for causing display of a plurality of modes on the display when the ring member has been positioned at one of the first position or the second position, and then, when the ring member has been slid to the other of the first position or the second position after a specified mode has been selected in accordance with rotation of the ring member, causing display for selecting numerical values in accordance with the selected mode on the display; an encoder that generates signals in accordance with a rotation operation of the ring member; a position detection circuit for determining positional change accompanying slide movement to the first position or the second position by the movement mechanism; and a clock counter, wherein responsive to a determination of a positional change of the ring member to the first position or the second position accompanying the slide movement, a value of the clock counter is reset, and otherwise, responsive to a determination of no positional change of the ring member to the first position or the second position accompanying the slide movement, a value of the clock counter is incremented.