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F.8 Focusing with the 80D

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    F.8 Focusing with the 80D

    Please move if not in the right section , but just reading the April -June issue of the EOS magazine , if I have read it right , the 80D will retain 27 active focusing points with a lens and converter with a maximum aperture of f8 , that would open up some more workable combinations regarding lens and converter options . Just wanted to check I got it right .

    #2
    Re: F.8 Focusing with the 80D

    Says the same on the website too...
    Nigel

    You may know me from Another Place....

    The new ElSid Photogallery...

    Equipment: Far too much to list - including lots of Nikon...

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      #3
      Re: F.8 Focusing with the 80D

      Doesn't work with the Sigma 150 - 600 and the Kenko 1.4 TC. In fact, I just get an error message.
      EOS 6D, 6D Mk II, 80D, 70D, 100D, 200D, M50, M100. Canon 10-18, 18 - 55, 55 - 250 IS STM lenses, Canon 16 - 35 mm F4L, 35 mm EF-S macro, 50 mm F1.8 STM, 60 mm EF-S macro, MPE-65 macro, 85 mm F1.8, 200 mm F2.8 L II, M 15 - 45 mm, M 22mm F2, M 32mm F1.4. Sigma 24 - 35 F2 Art, 135 mm F1.8 Art, 17 - 50 F2.8 DC, 105 mm OS macro, 100 - 400 C, 150 - 600 C.

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        #4
        Re: F.8 Focusing with the 80D

        As far as I'm aware (and according to the article), it will only focus at F8 with 27 AF points with certain lenses and converters ie 100-400L (new version) + 1.4 Mk3 converter but not for example with the Mk2 converter.

        With other Canon lens/converter combinations I believe it will still focus at F8 but only with the single centre AF point.

        Capture.jpg
        Last edited by LesC2009; 21-09-2016, 22:24.
        Les


        Les Cornwell Photography

        EOS R, EOS 6D MKII, EOS 100D, EOS50e, RF24-104 F4L, EF17-40 F4L, EF24-70 F2.8L II, EF70-200 F4L IS, EF100-400 F5.6L MKII, EF100 F2.8L IS, EF-S 18-135 STM, EF-S 18-55, GP-E2, 270EX, 430EX II, Kase & Lee filters.

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          #5
          Re: F.8 Focusing with the 80D

          I have previously published this info but here it is again .the 80D and 7Dmkii when combined with the sigma 150-600 lenses will not a/f if used with either the kenko HD tc or the canon mkiii tc and according to Rumor the sigma tc doesn't work either .

          However the above cameras and lens combo's WILL work albeit on centre point only with the canon mkii tc giving decent results to with slightly slower a.f .

          This appears to be specific to these two camera bodies ,I previously had no problems with lens and t.c combos on the 1D3.leading to the suspicion that there is dedicated blocking software installed in these bodies .

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            #6
            Re: F.8 Focusing with the 80D

            O.K , I am often a bit sleepy when reading , did not take in about it only achieving the focus points with certain lenses .

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              #7
              Re: F.8 Focusing with the 80D

              Use live view?

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                #8
                Re: F.8 Focusing with the 80D

                The main reason for wanting f8 focussing is for using a teleconverter with a long lens, often for action such as birds in flight, so live view isn't very practical.
                I still can't understand how the IS STM 55 - 250 mm (and even the 18 - 55 kit lens) focus perfectly well with the Kenko 1.4 TC with practically any EOS camera, even those which are said to definitely not work at f8 maximum aperture, such as my 70D and 100D. I expected the 80D to work, but not the others.
                EOS 6D, 6D Mk II, 80D, 70D, 100D, 200D, M50, M100. Canon 10-18, 18 - 55, 55 - 250 IS STM lenses, Canon 16 - 35 mm F4L, 35 mm EF-S macro, 50 mm F1.8 STM, 60 mm EF-S macro, MPE-65 macro, 85 mm F1.8, 200 mm F2.8 L II, M 15 - 45 mm, M 22mm F2, M 32mm F1.4. Sigma 24 - 35 F2 Art, 135 mm F1.8 Art, 17 - 50 F2.8 DC, 105 mm OS macro, 100 - 400 C, 150 - 600 C.

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                  #9
                  Re: F.8 Focusing with the 80D

                  Originally posted by Richard W View Post
                  The main reason for wanting f8 focussing is for using a teleconverter with a long lens, often for action such as birds in flight, so live view isn't very practical.
                  I still can't understand how the IS STM 55 - 250 mm (and even the 18 - 55 kit lens) focus perfectly well with the Kenko 1.4 TC with practically any EOS camera, even those which are said to definitely not work at f8 maximum aperture, such as my 70D and 100D. I expected the 80D to work, but not the others.
                  It seems to depend on how the converter talks to the lens and the camera and exactly what it passes on. As I understand it Canon's gear reports the corrected maximum aperture including the correction factor ans part of the lens information and it's the camera firmware that reads this and disables the AF if the Lens ID info says the max aperture is smaller than f5.6.

                  I've encountered this with my 70-200 F4L, 70-210 F4 ('87 vintage) and two different Kenko 2x converters. The Pro-300 converter appears to pass the corrected aperture to the camera (it displays in the 'finder) with the L but not the old version - as a result the L lens doesn't even try to AF while the old one does albeit rather slower than it's usual snails pace. Replace the Pro-300 converter with an older MC-7 type and both lenses will then try to focus and the finder displays the set aperture not the true one.
                  Nigel

                  You may know me from Another Place....

                  The new ElSid Photogallery...

                  Equipment: Far too much to list - including lots of Nikon...

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                    #10
                    Re: F.8 Focusing with the 80D

                    The Manual pp118..126 (In the Feb 2016 edition) gives chapter and verse.

                    A friend uses the 80D with a 100-400L Mark II with a 1.4xIII without any issues (albeit 'just' 27 points, although he tends to use just the centre AF anyway). The original 1.4x and 1.4xII will work with centre AF only.

                    So the OP got it right.

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