Traditional Culture Encyclopedia - Photography major - Where are the zoom, manual focusing and aperture adjustment of SLR cameras completed respectively?

Where are the zoom, manual focusing and aperture adjustment of SLR cameras completed respectively?

Zoom: Zoom is achieved by rotating the zoom ring of the lens.

Focus: first set the lens focus mode lever to M manual mode, and then turn the focus ring to focus.

Aperture adjustment: Automatic lenses usually have a dial on the body, which can directly adjust the aperture, while manual lenses need to adjust the aperture by rotating the aperture ring on the lens.