Canon EF 200mm f2.8 L II USM with Canon Extender EF 2x III AF speed test + sample images

400mm Telephoto lens f5.6 on Canon EOS APS-C Camera
640mm (35 mm equivalent focal length)
EF 200mm f2.8 L II USM with Canon Extender EF 2x III
AF speed test
sample images

[@MrMonfabio]

Hi, What about the final image quality and focus speed and acuracy?

[@GinoFoto]

No problem with focus speed and acuracy, image quality on full frame like 6D is superb, but I donˇt recommend this combination to use with APS-C, 2 time extender is simply too much for.

[@MrMonfabio]

Sorry, but I didn't understand about APS-C being too much... Too long?

[@GinoFoto]

too much pixel density on modern APS-C to render fine details with 2x extender...