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Robots hand polish Canon’s L-series lenses, and 9 more facts about the Utsunomiya lens factory

The Canon EF 100-400mm f/4.5-5.6L IS II is one of the most difficult lenses to build, according to Canon

The Utsunomiya lens factory in Japan is where all Canon L-series lenses are produced.

Sci-fi style robots, fault-hearing engineers, anti-static shoes – Canon’s Utsunomiya lens factory is a hotbed of innovation and precision. Canon’s L-series lenses are known around the world for their professional-quality build and sharp results, but to produce such outstanding lenses requires impressive levels of craftsmanship, attention to detail, and a few surprising practices.

Canon Europe posted a short and neat article with 10 (supposedly) unknown facts about Canon’s L lenses, and the Utsunomiya factory. These are:

  • Japanese engineering is everywhere
  • Lens experts can hear faults
  • Lens polishing tools are made with diamonds
  • Aspherical lenses are made by melting glass
  • Sci-fi robots roam the factory
  • Lens polishing machines self-correct
  • Lens measurements are incredibly precise
  • The hardest lens to make is…
  • The innovation never ends
  • Canon lenses could (probably) cover half the world

If you want to know more about the facts listed above (every point comes with text and pictures) and the Utsunomiya factory, I encourage you to head over to Canon Europe.

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