Abstract: A photoelectric conversion device including pixels, a scanning circuit and a controller is provided. The scanning circuit performs a driving operation including a first scan of causing the pixels to start an accumulation operation and a second scan of reading out signals from the pixels. The second scan includes first and second driving operations that are different in a length of a readout period. The controller is configured to supply, to the scanning circuit, a first synchronization signal for controlling the first scan and a second synchronization signal for controlling the second scan. A relationship between a cycle of the first synchronization signal and the second synchronization signal in the first driving operation and a cycle of the first synchronization signal and the second synchronization signal in the second driving operation is a non-integer multiple or a non-integral submultiple.

Abstract: A zoom finder has first to third lens groups sequentially arranged from an object side to an eye pupil side and performs a zooming operation by fixing the first and third lens groups and moving the second lens group. The first lens group is constructed by a positive single lens. The second lens group is constructed by a negative single lens. The third lens group has a positive combinational focal length and is constructed by a negative single lens arranged on the object side and a positive single lens arranged on the eye pupil side. A frame system of the zoom finder is formed by an eye pupil side lens face of the negative single lens of the third lens group and the positive single lens of the third lens group. Radii R.sub.1 and R.sub.2 of curvature of lens faces of the first lens group on the object and eye pupil sides satisfy the following condition.0.8<R.sub.1 /.vertline.R.sub.2 .vertline.<1.2 (I)At least one lens face of the first lens group is constructed by an aspherical surface.