| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent insertion of a filter that is not intended by an operator, by preventing direct replacement between two or more ND filters used for a gradual reduction in quantity of light and a special filter that is lower in use frequency than the ND filters and is not continuous with the ND filters. <P>SOLUTION: In a turret 62 for filter replacement, ND filters F1 and F2 for gradual reduction in quantity of light and a visible light cut filter F3 are disposed on the same circumference with a normally used dummy glass G therebetween. The rotation range of the turret 62 is limited so as to fall within 360 degrees and both ends of the rotation range are disposed between the ND filters F1 and F2 and the visible light cut filter F3. This prevents insertion of a filter that is not intended by an operator and prevents a discomfort video from being photographed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
