| 摘要 |
A light amount adjusting apparatus is constructed by a driving source, a plurality of light shielding members each having a notched portion adapted to form a light passing port, in which the light shielding member is moved by being driven by the driving source to thereby vary an area of the light passing port which is formed in the notched portion, and at least one filter provided for the notched portions of the plurality of light shielding members, in which the filter is provided so as to cover a part of the notched portion and has a first area having first light transmittance and a second area having second light transmittance lower than the first light transmittance. When the area of the light passing port which is formed by the light shielding members is in a maximum state, a relation (A 3 <A 2 <A 1 ) is satisfied assuming that, in the light passing port, A 1 indicates an area of a portion which is not covered with the filter, A 2 indicates an area of a portion covered with the first area of the filter, and A 3 indicates an area of a portion covered with the second area of the filter.
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