| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the need for a mechanical adjustment process, to improve adjustment efficiency by facilitating an adjustment process and shortening an adjustment time, and to prevent a semi-assembly interchangeable lens from being adversely affected by vibration, heat, chips or the like. SOLUTION: The interchangeable lens includes a correcting-motion converting section Ms in which a female thread 2n formed on the internal circumferential face of a focus ring is helically engaged with a male screw 5s formed on the external circumferential face of a ring support cylinder 5 supporting the focus ring 2 on the inside. The interchangeable lens also includes a correction amount selecting means Fs that selects the correcting-motion converting section Ms from a plurality of correcting-motion converting section Msa, Msb, and so on, which are different from one another in a conversion ratio for the amount of axial displacement after motion conversion made relative to an amount of circumferential displacement of the focus ring 2. COPYRIGHT: (C)2010,JPO&INPIT
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