> Does anybody have knowledge about differences in performance in > comparison to the K T6 2x ?
[Hi, Pancho - here's my answer to a similar question a while back.] I have used both the A 2X-S and the older T6-2X with several prime lenses (especially with the M* and A* 300/4 lenses), and I have found them to be both pretty good (considering, of course, that a TC is always a compromise), and very difficult to tell apart optically. Pentax, in the T6-2X owners manual doesn't seem to recommend its use with lenses over 300mm, while the A 2X-S doesn't seem to have the same possible limitation. One thing you'd miss with the T6-2X would be the "A" electrical contacts, which could be important with newer bodies (for matrix metering, I guess), although this doesn't matter to me on my LX's and Super A's. One advantage the T6-2X has over the A 2X-S is that it is physically shorter it's almost as short as the A 1.4X-S, and is about the same size as the F 1.7 X "autofocus converter"), and makes a better match for such compact lenses as the M* and A* 300/4's. Fred
