Na ja, ich hatte das Objektiv zwar noch nicht in der Hand gehabt, aber ich denke das ist dem Unterschied beim AF Motor geschuldet. Die höherwertigen haben einen Linearantrieb verbaut. Das FE50mm einen Gleichstrommotor. Eine Preisfrage.
Edit:
Das habe ich gerade bei dpreview gefunden:
Zitat:
One thing in particular we should call out is that this particular lens does not open up its iris during AF acquisition (on an a7R II, and probably all other bodies), which means that focus speeds get slower and slower the more you stop down. Sometimes at smaller apertures in challenging light, focus can fail altogether, working again if you revert to a wider shooting aperture. This aperture dependence of focus is unfortunate, and somewhat crippling in some scenarios, sometimes forcing you to dial in F1.8, focus, switch to MF, then stop down and shoot. Sony says this is intentional design to avoid the extra time it takes to open and close the aperture during AF acquisition - a valid concern.
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Zur Info: Das Sony-Zeiss 55mm/1.8 öffnet die Blende beim Fokussieren an der A7RII.
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