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Canon Patent for Curved Diaphragm

Curved Diaphragm Curved Diaphragm

Egami (translated) spotted another patent filed by Canon (we had more Canon patents lately: 1 | 2 | 3).

The patent refers to the implementation of a curved diaphragm. I guess this could be very useful for miniaturization purposes. Is there another super-small DSLR like the Rebel Sl1 (price & specs) coming?

  • Patent Publication No. 2014-13363,2014-13365
    • Publication date 2014.1.23
    • Filing date 2012.6.6
  • Canon patents
    • The iris of the dome-shaped
  • Cinekpol

    Canon did a lot to miniaturize lenses for DSLRs – most notably DO elements (70-300 DO is tiny, even if it got it’s own issues with image quality) – if that’s yet another step to make stuff even smaller, than I can’t wait to be amazed by their next lens. Let’s just hope that they can minimize issues with DO elements.

  • skander

    Fail: Leitz owns this patent, has done since before 1930 when the lens in the attached picture was made. The blades follow the curved surfaces of the solid brass aperture race seen center, curved side up. This formed a dome between concave and convex elements, which did indeed allow for a more compact and faster design. I love my Canons, but they didn’t invent this or even re-invent it.

    I cannot see the pic I posted, will try again.

  • skander


  • skander

    And here…

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