| 摘要 |
PURPOSE:To obtain a compact device by providing different distance measuring zones and set positions of a conversion lens for daylight telephotography and strobe telephotography. CONSTITUTION:A master lens 9 is used as a fixed-focus lens during wide-angle photography to form a sharp image on a film by utilizing the depth of field of the lens, and the conversion lens 25 is inserted in an optical axis 15 behind the master lens 9 during telephotography. Then, this lens 25 is moved associatively with the operation of a distance measuring equipment to change set positions of the conversion lens 25 in two stages according to a close distance zone and a long distance zone detected by the distance measuring equipment. In this case, the boundaries between the close distance zones and long distance zones are changed for daylight photography and strobe photography to change the lens set positions. |
