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How do lenses work mechanically?
How do lenses work mechanically? Not sure if this is the best place to ask but here we go. When I try to find the answers to this question, it's all about physics and optics. I already know that. What I want to know is: What is the mechanism that allows the aperture to open and close? What is the mechanism that allows to zoom in a zoom lens? What is the mechanism that allows th...
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