> [The a 2X-S's] are very well made. I also had a T6-2X which was > optically just as good, and also well made, but didn't have quite > such a rock-solid feel to it. Finally, I've also had a Takumar 2X, > which felt very flimsy.
I've found that the 7-element A 2X-S and the 6-element T6-2X seem to be optically virtually identical (in results, not in design), at least with the lenses that I've used 'em with. I have never found any fault with "flimsiness" in either TC. The neat thing about the T6-2X is its size - it's maybe only 2/3 the length of the A 2X-S (and not much longer than the A 1.4X-S), and it makes a good match for the compact (even if heavy as a tank) M* or A* 300/4 lenses. The 4-element Takumar-A 2X TC is, well, a typical 4-element design, and is optically mediocre in comparison. All TC's are compromises, of course, but the ubiquitous 4-element designs are really not worth using (in my opinion). Fred
