The latest patents: Fujinon 14mm f/1.8, Canon 135mm f/2 lenses and more

fuji-fujinon-14mm-f1-8-lens-patent
→ Fuji has a new patent for a Fujinon 14mm f/1.8 lens designed for APS-C sensor (Fuji currently has a XF 14mm f/2.8 lens in their lineup).

canon-135mm-f2-apo-lens-patent
→ Canon 135mm f/2 lens with apodization filter patent.

canon-rgbw-12-sensor-array-patent1 canon-rgbw-12-sensor-array-patent2
→ Canon has a patent for a RGBW 12 sensor array.

konica-minolta-20mm-f2-8-lens-patent
→ Konica Minolta has a new patent for a 20mm f/2.8 lens.

konica-minolta-50mm-f1-4-lens-patent-for-43-sensors
→ Konica Minolta also has a patent for 50mm f/1.4 lens designed for 4/3" sensors.

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  • J-Man

    The canon lens will have an Apodization Filter, not Apochromatic, many of Canon long L’s are already Apochromatic, but don’t say so.

    • John-F

      The traditional definition of apochromatic correction (as taught in engineering classes) is an optical system corrected for three (3) wavelengths (not 2). 99% of all lenses sold are corrected for only two wavelengths – thus making them ‟achromats‟, not apochromats (Leica’s requirements for the APO prefix is considerably more demanding).

      If Canon’s long telephoto L series lenses are indeed genuine Apochromats, then this would be big news! It would make sense since in order to achieve APO correction, glass with anomalous dispersion characteristics (not ED or UD glass …) must be used. Since Canon has long been a user of Fluorite ( not glass BTW) elements, and since Fluorite does have anomalous partial dispersion, it would make sense that Canon L series telephoto lenses using Fluorite would be Apochromatic.

      What would NOT make sense is WHY would Canon not wish to advertise this unique advantage over its competitors – especially since Nik.. recently started using fluorite … ?

      P.S. To the best of my knowledge (and I have been following the Japanese photo industry since 1973), the only true APO lenses (made in Japan) for either 35mm or 120 MF were those made by Mamiya for their RB67 camera system.

      If anyone could bring more insight (or inside knowledge) to clarify the matter, I would be grateful. Thanks

      • J-Man

        I should have qualified that statement, that they may not technically qualify as a true APO, but for most uses, you wouldn’t see any difference since their performance is so good, and I have seen APO designated lenses that have more CA than Canon’s long L’s, that in my thinking definitely brings the L’s into APO territory.

        • johnny

          Many of Canon primes are indeed APO. Some even achieve higher degree of apochromatic correction.,e.g. 400DO II. I, too, own the three lenses you’ve mentioned. IMHO, 90APO is the least apo lens since it shows quite amount of LoCA wide open.

          • J-Man

            Any better corrected, and the 90 would be a $6000 lens, and would have been far outside my budget.
            I only had the 400/5.6L and I never had any IQ issues, and that was an old design(when I bought it), and it was one of the cheapest long lenses in their lineup.

          • John-F

            Since I wanted to get to the bottom of this story, I decided to call Canon USA today. After speaking with a Canon technician and explaining my interest in apochromatic lenses, he confirmed to me that there is no mention of APO or apochromatic correction of Canon L series lenses in any of the tech literature available to him – in short, none of the Canon L series tele lenses are APO.

            P.S. By coincidence, I just happen to find today a graph of wavelength vs focus error for a recent Canon tele lens. It is very clear from the graph that the lens is corrected for two wavelengths, not three. If you want a real APO lens for your Nik or Canon DSLR, the only lens available right now is the Zeiss Apo Sonnar 135mm f2.

      • Les

        There is no ISO definition of “apochromatic” for photographic lenses (there is for microscope objectives), so APO can mean whatever marketers want it to mean.

        Many reputable brands use the term to identify lenses that have a higher degree of colour correction, without specifying a target. In other words, it has a meaning when comparing lenses within one line, but not across different lines (Sigma vs. Mamiya, for instance).

        JohnF, you should know that ED glass is not required for apochromatic correction. You can also use a fully symmetrical design to cancel-out colour aberrations. Kinoptik does that with their 75/2.0, 100/2.0 and 150/2.5 lenses. The problem is that those lenses are huge, and they are only apochromatically corrected at one magnification ratio

    • I updated my post

  • aurele

    The konica patent is for a lens that cover 1/2.3″ sensor.

  • silmasan

    Re: abbreviation for apodisation, I think manufacturers could all agree on “APD” like Fuji did with their 56/1.2 APD.

  • johnny

    IMHO, no need for apodization filter on 135L. It produces very nice bokeh already.

  • Mistral75

    This is not the first time Canon are showing an interest in lenses with an apodisation element. There is also a 2012 patent (2012-128151) illustrated by six examples, five of which are 135mm f/2.8 lenses and one a 180mm f/3.5.

    The 2016-218444 patent is illustrated by six examples too: not only two 135mm f/2 but also a 24mm f/1.4, a 35mm f/1.4 and two 50mm f/2.

    In the 2016 patent, there are two apodisation elements, one on each side of the aperture, instead of one in the existing lenses (Minolta / Sony 135mm f/2.8 STF, Fujinon 56mm f/1.2 APD and Venus Optics Laowa STF 105mm f/2) and in the examples from the 2012 patent.

    Last but not least, phase-detection autofocus cannot be used in
    conjunction with an apodisation element (contrast-detection autofocus
    can).

  • Licheus

    I heard wild rumors of KM being involved in the development/manufacture of the Leica Q. Anyone have anything solid?

    • Who is KM?

      • raziel28

        Konica Minolta, probably…

    • MB

      Konica Minolta has not sold the entire lens development department to Sony and they are developing and selling lenses but mostly as OEM.
      There has been some rumors about Leica lenses developed by KM but those were m4/3 lenses for Panasonic (Leica DG Macro-Elmarit 45mm F2.8 for example), so maybe we could expect DG 50mm/F1.4 lens Leica branded, made by Panasonic, designed by KM in the near future … nice for portraits really …
      20mm is actually 2.95mm lens most likely for mobile phones …

      • John-F

        A few months ago, someone found a website in Japan which included optical designs for a few KM zoom lenses. IMHO, the similarities with three Leica T lenses (see below) were so great that I came away convinced that they were identical (or maybe 99% identical) to their corresponding KM lenses.

        Have a look for yourself:
        http://egami.blog.so-net.ne.jp/2015-03-25 (KM 55-135mm)
        http://egami.blog.so-net.ne.jp/2015-04-15 (KM 18-56mm)
        and
        http://egami.blog.so-net.ne.jp/2016-05-27 (KM 60mm f2.8 Macro – compare it to the Leica APO-Macro-Elmarit-TL 60mm, most interesting ….)

        Did KM acted strictly as OEM for Leica, or did they cooperate with Leica in the design of these lenses…?

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