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  1. Roy C

    1.4x extender query

    I had some reasonable results with the 300/2.8 IS + 1.4x and 2.0 x giving 840mm at f8 (1344mm fov on my 1.6x cropper) but it was certainly not a combo for everyday use.
  2. Roy C

    1.4x extender query

    You do not need the MkIII 1.4x tc to be able to AF with the 7D2 + 100/400 MkII combo. Centre point plus 4 expansion points are available with the Mk I or MkII 1.4 x extenders. I have tried the combo with both the MkII and MkIII 1.4x extenders and they both work equally well in both AF speed and...
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