Patent: Full frame f/2 zoom, possibly for mirrorless?

Canon Rumors Guy

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  • Jul 20, 2010
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    A patent application showing an unusual f/2 zoom from Canon has appeared in Japan (Patent application: 2018-132675). It’s possible that this zoom lens is related to a  mirrorless camera body with its short BF distance.
    Canon News tells us that the patent itself deals with a floating focus system to help reduce the size of the lens.

    Japan patent application 2018-132675:
    Focal distance      90.00 125.01 145.99 109.96 130.49
    F number             2.06   2.06   2.06   2.06   2.06
    a half field angle  13.52   9.82   8.43  11.13   9.41
    Image height        21.64  21.64  21.64  21.64  21.64
    Whole length       242.35 242.35 242.35 242.35 242.35
    BF                  16.70 1 6.70  16.70  16.70  16.70 
    Focal distance      72.03 115.04 145.99  92.39 123.70
    F number             2.06   2.06   2.06   2.06   2.06
    a half field angle  16.72  10.65   8.43  13.18   9.92
    Image height     ...

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    Hesbehindyou

    EOS 90D
    Jun 6, 2011
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    This is likely just a technical demonstration to illustrate the floating focus mechanism, perhaps chosen because it shows a large size-reduction in the lens i.e. they've chosen a focal range and aperture that most clearly shows the size-reduction benefits of floating focus.

    Then again, why make things complicated with all those elements if it's just a paper exercise so maybe this is a lens that's being developed. As others have pointed out, it's perfect for portraits (though maybe I'd like it to be a little longer but that could just be because I've got a large, unflattering nose)
     
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    Ozarker

    Love, joy, and peace to all of good will.
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    Jan 28, 2015
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    Looks like you can actually get it now :D
    Hopefully it will be in the 2020 releases. :) I would take that over any 70-200 f/2.8. I had a feeling there might be something special to match the 28-70. Now I just hope it gets produced. Maybe, just maybe it will be internal zoom also. o_O
     
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