| 摘要 |
PURPOSE:To select aperture freely and to make correct internal light photographing possible by such constitution in which an aperture ring and a distance adjusting ring are operated cooperatively or independently. CONSTITUTION:When a distance adjusting adjusting ring 1 is moved in a right direction against the pressure of a click ball 13 in the state that an engaging projection 8a and an engaging recess 4b are disengaged (figure a), an aperture ring 4 also moves integrally rightward, and brushes 3 and 6 slide on resistors r1-r4, by which the current of an integrating circuit is changed and the lighting time of a flash lamp is adjusted. When an aperture selecting ring 8 is slided upward along a cam groove 11 to engage one of the plural recesses 4b and the projection 8a and the ring 8 is moved rightward (figure b), the aperture is set and the current value of the integrating circuit is adjusted in the similar manner. When the distance adjusting ring 1 is moved rightward in this state (figure c), the click stop is engaged with the ring 8 and therefore the distance is adjusted independently. Hence, the correct flash photographing is feasible in spite of free selection of the aperture. |
