Frantisek wrote on 14.03.05 13:24: > I too found out a lot of purple fringes - I attributed it to flare > though. God knows what it was. But remember that the Sigma in Nikon > mount uses HSM - their equivalent of ultrasonic motors. These do make > the focusing a lot faster, especially on a body with weak AF motor > like the D70. I think on Pentax the difference wouldn't > be big? Well, when I was in Italy last year, we have an opportunity with Dario to test this Sigma head to head on both - D70 and *istD. And to my surprise AF on Pentax was about as fast as on D70 at least in good light conditions. Of course Pentax was much noisier and there was no FTM. So I suspect AF with Tokina would be slower than with Sigma on Pentax. One more thing. Sigma produces two perfectly matched for 70-200/2.8 APO teleconverters - 1.4x and 2x. I didn't try them myself, but from what I've read so far, even 2x TC gives good results, especially on DSLR.
-- Balance is the ultimate good... Best Regards Sylwek
