Does Canon SLR lens need to be replaced frequently? How long can a lens last?

First of all, the lens has a long service life. If you pay attention to maintenance, it will not be a problem for ten or twenty years. Therefore, replacing lenses is generally not because of service life, but because of use or other reasons.

As for whether it needs to be replaced or not, how long it will take depends on the individual's use needs.

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If you are not clear about your shooting preferences, shooting themes and shooting habits at first, it will be more convenient to buy a large zoom lens. Although the image quality and distortion are slightly poor, it is more convenient to use, and you can gradually accumulate experience in the process of using, find out your most commonly used focal length, and provide data reference for replacing lenses in the future. Wait a year or two to replace the lens products with more targeted ones according to the budget and your own shooting needs.

If you are very clear about your shooting theme and the type of lens you need from the beginning, of course, you can directly buy the most suitable lens products, and then if the budget is sufficient, you can buy relatively high-end lenses, which can basically last for a long time. Unless the lens is damaged due to quality or external factors, or you suddenly change your shooting preferences and themes.