What are the advantages of auto focus lens and manual focus lens

Manual focus lens selection generally has the following categories: Old lenses used in mechanical cameras in the film age. These lenses are now cheaper (except for collectibles). They are much cheaper than autofocus lenses of the same specifications. Although they can also be used, they are designed (resolution, dispersion). , Distortion control, etc.) has fallen behind the times. If the budget is limited, or if you want to experience the so-called feeling of the old lens (metaphysics), you can consider starting, it is not expensive anyway. Special-purpose lenses, such as the lenses made by Zeiss for Nikon (Otus, Milvus series, etc.) are manual focusing. These lenses have high specifications and high prices. If you pursue the ultimate optical performance, you can consider; There are special lenses such as reentrant lenses, technical cameras, and large format cameras, which are not available to most people. The lenses of Leica M camera system, M series are all autofocus. , Manual focus lens can indeed experience the fun of manual focus, and sometimes it is necessary to use manual focus for shooting, such as macro photography, when the foreground is cluttered with interference, or when the focus point is a solid color, etc., then auto focus is not necessarily It works well; and the price of manual focus is also cheap, you can consider starting when you have a limited budget or just want to experience the "feel" of an old lens. Excluding the above factors, manual lens is not recommended. The old lens with the new body is not very good in terms of resolution, lens correction, operation feel, anti-shake, etc., not to mention the shooting of news, sports, animals, etc. If you just want to experience manual focus, basically all automatic lenses have a manual mode.