| 摘要 |
PURPOSE:To prevent overrun of a focusing lens or the occurrence of deficiency in a movement amount thereof by detecting movement of the focusing lens to transmit the movement to a drive control means no through a photographing information means, and relating the movement to control of focusing drive. CONSTITUTION:A CPU 109 adds the difference of an image deviation amount produced through movement of a focusing optical system L2 and corrects an image deviation amount from a movement amount of the focusing optical system detected by means of a pulse signal outputted from an encoder 116 and inputted according to an image deviation amount calculated based on an output signal from a photoelectric converting part 108 for detecting a focus and a ratio value between a movement amount of a focus optical system L2 and a movement amount of an image surface, and transmits a result to a CPU 110. Photographing information, such as aberration, a focus distance, and release F value, is outputted as a lens parameter from the CPU 110 to the CPU 109 in a body. The CPU 109 adds a lens parameter to calculate an image deviation amount. This constitution performs excellent focusing. |
