But now, in order:
Processing Extender is simply superb, high accuracy, both on the camera and the lenses used towards, not the slightest game!
The autofocus function is maintained, the reduction of the speed is absolutely negligible, and the collaboration with the stability is impeccable.
Let's talk about image quality: color reproduction remained perfect and the way I was used to from my lenses it.
But the resolution of the two objectives above (which are so crisp on their own!) Has decreased significantly (even without 'Pixel-Peeping'!), Where previously the finest structures were visible, now soft and essential 'schwammigere' surfaces, edges, etc. . And that was the exclusion criterion for me, so I really enjoyed the focal growth recovered!
This is also 3 points Extender EF 1.4x III Abzug.Canon
