Photoclubalpha

This is another lens I bought after reading its excellent reviews without trying. Well it is good, well built and razor sharp. The issue..I don't like is slow AF speed. Mounted on an A6k, it is not as quick as Sigma 150 on D800. Is there any explanation?

What's the make?

Presumably the new Sony. Try the Tamron 90/2.8 1:1 as an alternative. Focuses fast at both short and long throw.