G03B 7/18
Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with light-reducing "factor" of filter or other obturator used with or on the lens of the camera
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Edits on 5 Mar, 2022
Golden AI
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G03B 7/18
Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with light-reducing "factor" of filter or other obturator used with or on the lens of the camera
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