| 摘要 |
A camera filter frame (10) includes a front ring (4) for holding a polarization filter (2) and a rear ring (5) for rotatably holding the front ring (4). The front ring (4) includes a rear annular wall portion (18) extending in a radial direction (R), a rear annular plate portion (19) extending rearward from the inner peripheral end of the rear annular wall portion (18), and an annular projection portion (20) projecting in an outer peripheral direction for a short distance from the rear end of the rear annular plate portion (19). The rear annular wall portion (18), the rear annular plate portion (19), and the annular projection portion (20) form an annular recess (21) on the outer peripheral surface of the front ring (4). The rear ring (5) is provided with an annular protrusion (45) protruding in an inner peripheral direction. The annular protrusion (45) is inserted in the annular recess (21) of the front ring (4). |
