| http://www.w3.org/ns/prov#value | - However, in this lens barrel, since the first concave portion is arranged in a region other than between the first and the second facing portions, it becomes unnecessary to fix the second lens to a thin portion, and it is possible to improve the accuracy of mounting the second lens, and at the same time, it is possible to prevent the fixation strength of the second lens from deteriorating.
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