ahalpert
Major Contributor
The Tamron zooms will probably not match AF performance of a Sony zoom (unless you got the Sony A mount version of the Tamron and adapted it? I dunno.) But for MF, they are probably better. My 18-270 has hard stops at either end of the focus range. The ring is very loose and it's a relatively short focus throw, but I have no problem repeating focus moves and controlling the speed.