No matter what the lens, when I see people asking for opinions on one online, I see a pretty wide mix of “It’s awesome, it never leaves my camera!” and “It sucks, I sold it within a week” type responses. If you’ve ever wondered why there are such polarising opinions on any given lens, then wonder no more.

In this video, Michael the Maven discusses one of the things that’s rarely spoken about when it comes to lenses, and that’s manufacturing tolerances. These are the limits on either side of “perfect” in which a company will allow components to fall. But they can make for big differences in image quality.

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