Canon Camera Museum - How lenses are made
In another forum a person was nice enough to provide a link to the Canon Camera Museum. At this URL, there is a small movie that describes the Material Process, Lens Machining, and Lens assembly processes.
They describe the entire process here
Its very interesting how they manufactured a 500mm F4 IS USM lens containing 13 groups and 17 elements.
I suspect other lens manufacturers do something similar.
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