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Teleconverters, TC-20 EIII and 200-500mm no autofocus? Experiences wanted.
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<blockquote data-quote="BackdoorArts" data-source="post: 533846" data-attributes="member: 9240"><p>Ability to focus has nothing to do with your chosen aperture, it has to do with the minimum aperture of the lens and the camera's ability to focus at <strong><em>that</em></strong> aperture. As J-See pointed out, the f5.6 minimum aperture is probably fine for your camera by itself, but with the converters that minimum aperture gets multiplied too, and the values of f9.52 and f11.2 are higher than the min aperture AF rating of all their cameras. That's not to say that it wouldn't work on a bright day with a well defined subject, but it wouldn't be something you could count on.</p></blockquote><p></p>
[QUOTE="BackdoorArts, post: 533846, member: 9240"] Ability to focus has nothing to do with your chosen aperture, it has to do with the minimum aperture of the lens and the camera's ability to focus at [B][I]that[/I][/B] aperture. As J-See pointed out, the f5.6 minimum aperture is probably fine for your camera by itself, but with the converters that minimum aperture gets multiplied too, and the values of f9.52 and f11.2 are higher than the min aperture AF rating of all their cameras. That's not to say that it wouldn't work on a bright day with a well defined subject, but it wouldn't be something you could count on. [/QUOTE]
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Teleconverters, TC-20 EIII and 200-500mm no autofocus? Experiences wanted.
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