| 摘要 |
PURPOSE:To execute automatically a sufficient focus correction to an interchangeable lens whose chromatic aberration is large, as well, by constituting a titled camera so that a focus correction of a photographic lens is executed by calculating a correcting quantity to a shift quantity of a focal position, which is caused by a difference of a wavelength of a photographing luminous flux and a projecting luminous flux for detecting a focus. CONSTITUTION:A luminous flux obtained from a photographic lens system 10 is photodetected by a focus detecting system 13, a non-focusing signal is sent to a driving control system 14, and a control signal (c) is transmitted to a photographic lens driving system 11. The driving system 11 executes driving (d) of the photographic lens 10. When the focus control system 13 reaches a focused state, the transmission of a non- focusing signal (b) is stopped, and a focusing signal (e) is transferred to a correcting system 15. A correction operating system 12 sends to a correcting system 15 a correcting quantity (g) for a shift quantity of a focal position, which is caused by a difference of a wavelength of a photographic luminous flux and a projecting luminous flux, by information (f) of the photographic lens system 10 in that case, and the correcting system 15 sends a correction driving control signal (h) corresponding to the correcting quantity (g) to the photographic lens driving system 11. In this way, a sufficient focus correction is executed to an interchangeable lens whose chromatic aberration is large, as well. |
