Abstract: An electronic shutter for a camera includes a first driving force generating mechanism for generating driving force for moving a lens barrel in a direction of an optical axis, a lens barrel moving mechanism for moving the lens barrel by use of driving force from the first driving force generating mechanism, an adjusting mechanism for adjusting a focus adjusting to an initial position when electric power is applied or a shutter release operation is applied, a second driving force generating mechanism for generating driving force for driving three sectors, a sector opening/closing mechanism for opening and closing the sectors by use of driving force from the second driving force generating mechanism, and an exposure position detecting mechanism for detecting an exposure position by cooperating with the sector opening/closing mechanism.