Lens For Canon Camera

Donald asks…What SLR lenses allow for manual aperture control when not connected to a camera body?I'm looking to do a project to learn more about cameras and lenses. I would like to build a custom camera. Obviously I cannot produce my own lenses, so I need to purchase some. I've had experience with Canon FD and EF lenses where when the lens is not connected to a Canon camera body, the aperture cannot be controlled. Which lenses are capable of the aperture control when not connected to the

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