Scott, I don't have a "good" 2xTC, so this is the opinion of the poor folk. I do have a Tamron 2x (4 element) and a Tokina 2x (7 element) and the Vivitar. I'd pick the Vivitar any day of the week. The built-in extension is useful, and it's well made, and it gives me pleasing shots.
-Lon Scott Nelson wrote: > > I seem to recall hearing good things about this TC, but a search of the > PDML archives didn't turn up anything useful. Has anyone got one? How > do you like it? If I did pick one up, I'd be using it with a 135/2.5 > and a 50/1.7. > > -Scott