Nice video showing how Canon makes its camera lenses

Here’s a pretty nice three-part video of how Canon makes its camera lenses. To me, this is required viewing no matter what brand camera you shoot or even if you’re just interested in the science of glass making. It shows Canon’s process of mixing and heating the raw materials to make glass, then the machining of the glass and assembling the lenses. I can understand why big glass is so expensive.

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