> I'm interested in finding out if anyone has an opinion on the > difference in quality of the T6-2X and A 2X-S teleconverters. I > can see by the specs that the A2X-S replaced the T6-2x in 1984 and > I see that they are of different designs.
> What I want to know is if one is better or optically superior to > the other? I've used both the T6-2X and the A 2X-S on a few prime lenses (especially the M* and A* 300/4 lenses), and I have found both TC's to be pretty good (considering, of course, that any "rear converter" - as Pentax likes to call them - is always somewhat of a compromise), and I've found it pretty hard to tell them apart optically (at least when used on the two M*/A* 300/4's). One thing you might miss with the T6-2X is the "A" electrical contacts on the 2X-S, which might be important with the newer bodies (including the *ist-D, I guess), though that's not much of a concern for me on my LX's and Super A's. On the other hand, one nice thing about the T6-2X is that it is physically shorter than the A 2X-s - it's almost as short as the A 1.4X-S, or about the same size as the F 1.7 X, and it does make for a better companion for such compact lenses as the M*/A* 300/4's. Fred
